Spencer Barrett

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Áreas de atuação

Orientou

Produções bibliográficas

• ZHU, BI-RU ; Barrett, Spencer C. H. ; ZHANG, DA-YONG ; LIAO, WAN-JIN . Invasion genetics of Senecio vulgaris: loss of genetic diversity characterizes the invasion of a selfing annual, despite multiple introductions. Biological Invasions , v. 19, p. 255-267, 2017.

• COSTA, JOANA ; CASTRO, SÍLVIA ; LOUREIRO, JOÃO ; Barrett, Spencer C. H. . Experimental insights on the function of ancillary pollen and stigma polymorphisms in plants with heteromorphic incompatibility. Evolution (Lancaster, PA.) , v. 71, p. 121-134, 2017.

• BALOGH, CHRISTOPHER M. ; Barrett, Spencer C. H. . Stochastic Processes during Invasion: The Influence of Population Size on Style-Morph Frequency Variation in (Purple Loosestrife). International Journal of Plant Sciences , v. 177, p. 409-418, 2016.

• ARUNKUMAR, RAMESH ; MADDISON, TERESA I. ; Barrett, Spencer C. H. ; WRIGHT, STEPHEN I. . Recent mating-system evolution in is accompanied by -regulatory divergence. New Phytologist (Print) , v. 211, p. 697-707, 2016.

• CRUZAN, M. B. ; Barrett, S. C. H. . Postpollination discrimination between self and outcross pollen covaries with the mating system of a self-compatible flowering plant. American Journal of Botany , v. 103, p. 568-576, 2016.

• YIN, GE ; Barrett, Spencer C. H. ; LUO, YI-BO ; BAI, WEI-NING . Seasonal variation in the mating system of a selfing annual with large floral displays. Annals of Botany (Print) , v. 117, p. 391-400, 2016.

• TEITEL, Z. ; PICKUP, M. ; FIELD, D. L. ; Barrett, S. C. H. . The dynamics of resource allocation and costs of reproduction in a sexually dimorphic, wind-pollinated dioecious plant. Plant Biology (Stuttgart) , v. 18, p. 98-103, 2016.

• ECKERT, CHRISTOPHER G. ; DORKEN, MARCEL E. ; BARRETT, SPENCER C.H. . Ecological and evolutionary consequences of sexual and clonal reproduction in aquatic plants. Aquatic Botany , v. 135, p. 46-61, 2016.

• ANDERSON, B. ; PAUW, A. ; COLE, W. W. ; Barrett, S. C. H. . Pollination, mating and reproductive fitness in a plant population with bimodal floral-tube length. JOURNAL OF EVOLUTIONARY BIOLOGY , v. 29, p. 1631-1642, 2016.

• YAKIMOWSKI, SARAH B. ; Barrett, Spencer C. H. . The role of hybridization in the evolution of sexual system diversity in a clonal, aquatic plant. Evolution (Lancaster, PA.) , v. 70, p. 1200-1211, 2016.

• Barrett, Spencer C. H. . 2015: the year in review. Proceedings - Royal Society. Biological Sciences (Print) , v. 283, p. 20152812, 2016.

• ARUNKUMAR, R. ; NESS, R. W. ; WRIGHT, S. I. ; Barrett, S. C. H. . The Evolution of Selfing Is Accompanied by Reduced Efficacy of Selection and Purging of Deleterious Mutations. Genetics (Austin, Tex.) , v. 199, p. 817-829, 2015.

• Barrett, Spencer C. H. . Foundations of invasion genetics: the Baker and Stebbins legacy. Molecular Ecology (Print) , v. 24, p. 1927-1941, 2015.

• ZHOU, WEI ; Barrett, Spencer C. H. ; WANG, HONG ; LI, DE-ZHU . Reciprocal herkogamy promotes disassortative mating in a distylous species with intramorph compatibility. New Phytologist (Print) , v. 206, p. 1503-1512, 2015.

• Barrett, S. C. H. . The evolution of plant reproductive ecology in China. Journal of Plant Ecology (Print) , v. 8, p. 101-108, 2015.

• JOHNSON, MARC T.J. ; CAMPBELL, STUART A. ; BARRETT, SPENCER C.H. . Evolutionary Interactions Between Plant Reproduction and Defense Against Herbivores. Annual Review of Ecology Evolution and Systematics , v. 46, p. 191-213, 2015.

• Barrett, Spencer C. H. . Influences of clonality on plant sexual reproduction. Proceedings of the National Academy of Sciences of the United States of America , v. 112, p. 8859-8866, 2015.

• COSTA, JOANA ; CASTRO, SÍLVIA ; LOUREIRO, JOÃO ; Barrett, Spencer C. H. . Variation in style morph frequencies in tristylous in the Iberian Peninsula: the role of geographical and demographic factors. Annals of Botany (Print) , v. 1, p. mcv173, 2015.

• YAKIMOWSKI, S. B. ; Barrett, S. C. H. . Variation and evolution of sex ratios at the northern range limit of a sexually polymorphic plant. Journal of Evolutionary Biology (Printed ed.) , v. 1, p. n/a-n/a, 2014.

• HOUGH, J. ; HOLLISTER, J. D. ; WANG, W. ; Barrett, S. C. H. ; WRIGHT, S. I. . Genetic degeneration of old and young Y chromosomes in the flowering plant Rumex hastatulus. Proceedings of the National Academy of Sciences of the United States of America , v. 111, p. 7713-7718, 2014.

• CUNHA, N. L. ; FISCHER, E. ; LORENZ-LEMKE, A. P. ; BARRETT, S. C. H. . Floral variation and environmental heterogeneity in a tristylous clonal aquatic of the Pantanal wetlands of Brazil. Annals of Botany , v. 114, p. 1-13, 2014.

• ZHANG, Z.-Q. ; ZHU, X.-F. ; SUN, H. ; YANG, Y.-P. ; Barrett, S. C. H. . Size-dependent gender modification in Lilium apertum (Liliaceae): does this species exhibit gender diphasy?. Annals of Botany (Print) , v. 115, p. n/a-n/a, 2014.

• Barrett, S. C. H. ; ARUNKUMAR, R. ; WRIGHT, S. I. . The demography and population genomics of evolutionary transitions to self-fertilization in plants. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES , v. 369, p. 20130344-20130344, 2014.

• PERCY, DIANA M. ; ARGUS, GEORGE W. ; CRONK, QUENTIN C. ; FAZEKAS, ARON J. ; KESANAKURTI, PRASAD R. ; BURGESS, KEVIN S. ; HUSBAND, BRIAN C. ; NEWMASTER, STEVEN G. ; BARRETT, SPENCER C.H. ; GRAHAM, SEAN W. . Understanding the spectacular failure of DNA barcoding in willows ( ): Does this result from a trans-specific selective sweep?. Molecular Ecology (Print) , v. 23, p. 4737-4756, 2014.

• HOUGH, J. ; AGREN, J. A. ; Barrett, S. C. H. ; WRIGHT, S. I. . Chromosomal Distribution of Cytonuclear Genes in a Dioecious Plant with Sex Chromosomes. Genome Biology and Evolution , v. 6, p. 2439-2443, 2014.

• YAKIMOWSKI, SARAH B. ; Barrett, Spencer C. H. . Clonal genetic structure and diversity in populations of an aquatic plant with combined vs. separate sexes. Molecular Ecology (Print) , v. 23, p. 2914-2928, 2014.

• Barrett, S. C. H. . Proceedings B: moving forward to meet new challenges. Proceedings - Royal Society. Biological Sciences (Print) , v. 282, p. 20142834-20142834, 2014.

• BARRETT, S. C. H. . The evolution of plant reproductive systems: how often are transitions irreversible?. Proceedings - Royal Society. Biological Sciences (Print) , v. 280, p. 20130913-20130913, 2013.

• KISSLING, J. ; BARRETT, S. C. H. . Diplostigmaty in plants: a novel mechanism that provides reproductive assurance. Biology Letters (Print) , v. 9, p. 20130495-20130495, 2013.

• KISSLING, J. ; BARRETT, S. C. H. . Variation and evolution of herkogamy in Exochaenium (Gentianaceae): implications for the evolution of distyly. Annals of Botany (Print) , v. 112, p. 95-102, 2013.

• HOUGH, JOSH ; IMMLER, SIMONE ; BARRETT, SPENCER C. H. ; OTTO, SARAH P. . EVOLUTIONARILY STABLE SEX RATIOS AND MUTATION LOAD. Evolution (Lancaster, PA.) , v. 67, p. 1915-1925, 2013.

• PICKUP, MELINDA ; BARRETT, SPENCER C. H. . The influence of demography and local mating environment on sex ratios in a wind-pollinated dioecious plant. Ecology and Evolution , v. 3, p. 629-639, 2013.

• FIELD, D. L. ; PICKUP, M. ; BARRETT, S. C. H. . Ecological context and metapopulation dynamics affect sex-ratio variation among dioecious plant populations. Annals of Botany (Print) , v. 111, p. 917-923, 2013.

• HULME, PHILIP E. ; BARRETT, SPENCER C. H. . Integrating trait- and niche-based approaches to assess contemporary evolution in alien plant species. Journal of Ecology (Print) , v. 101, p. 68-77, 2013.

• FIELD, DAVID L. ; PICKUP, MELINDA ; BARRETT, SPENCER C. H. . COMPARATIVE ANALYSES OF SEX-RATIO VARIATION IN DIOECIOUS FLOWERING PLANTS. Evolution (Lancaster, PA.) , v. 67, p. 661-672, 2013.

• PUENTES, ADRIANA ; W. COLE, WILLIAM ; BARRETT, SPENCER C. H. . Trimorphic Incompatibility in (Pontederiaceae): An Aquatic Macrophyte from Lowland South America. International Journal of Plant Sciences , v. 174, p. 47-56, 2013.

• HUANG, S-Q ; Xiong Y-Z ; BARRETT, S. C.H. . Experimental Evidence of Insect Pollination in Juncaceae, a Primarily Wind-Pollinated Family. International Journal of Plant Sciences , v. 174, p. 1219-1228, 2013.

• BARRETT, S. C.H. . In Memoriam Rivka Dulberger 1922-2012. Plant Science Bulletin , v. 59, p. 51-52, 2013.

• COLAUTTI, R. I. ; Barrett, S. C. H. . Rapid Adaptation to Climate Facilitates Range Expansion of an Invasive Plant. Science (New York, N.Y.) , v. 342, p. 364-366, 2013.

• BARRETT, S. C. H. ; HOUGH, J. . Sexual dimorphism in flowering plants. Journal of Experimental Botany , v. 64, p. 67-82, 2012.

• NESS, ROB W ; SIOL, MATHIEU ; BARRETT, SPENCER C H . Genomic consequences of transitions from cross- to self-fertilization on the efficacy of selection in three independently derived selfing plants. BMC Genomics , v. 13, p. 611, 2012.

• BARRETT, SPENCER C.H. ; ARROYO, MARY T.K. . Variation in floral morph ratios in tristylous (Oxalidaceae): an Andean alpine endemic. Botany (Ottawa. Print) , v. 90, p. 1180-1185, 2012.

• FAN, X.-L. ; BARRETT, S. C. H. ; LIN, H. ; CHEN, L.-L. ; ZHOU, X. ; GAO, J.-Y. . Rain pollination provides reproductive assurance in a deceptive orchid. Annals of Botany (Print) , v. 110, p. 953-958, 2012.

• ZHOU, WEI ; BARRETT, SPENCER C. H. ; WANG, HONG ; LI, DE-ZHU . Loss of floral polymorphism in heterostylous (Rubiaceae): a molecular phylogeographic perspective. Molecular Ecology (Print) , v. 21, p. 4631-4645, 2012.

• de WAAL, C. ; BARRETT, S. C. H. ; ANDERSON, B. . The effect of mammalian herbivory on inflorescence architecture in ornithophilous Babiana (Iridaceae): Implications for the evolution of a bird perch. American Journal of Botany , v. 99, p. 1096-1103, 2012.

• PICKUP, M. ; BARRETT, S. C. H. . Reversal of height dimorphism promotes pollen and seed dispersal in a wind-pollinated dioecious plant. Biology Letters (Print) , v. 8, p. 245-248, 2012.

• de WAAL, C. ; ANDERSON, B. ; BARRETT, S. C. H. . The natural history of pollination and mating in bird-pollinated Babiana (Iridaceae). Annals of Botany (Print) , v. 109, p. 667-679, 2012.

• FIELD, DAVID L. ; PICKUP, MELINDA ; BARRETT, SPENCER C. H. . The Influence of Pollination Intensity on Fertilization Success, Progeny Sex Ratio, and Fitness in a Wind-Pollinated, Dioecious Plant. International Journal of Plant Sciences , v. 173, p. 184-191, 2012.

• FIELD, DAVID L. ; BARRETT, SPENCER C. H. . Disassortative mating and the maintenance of sexual polymorphism in painted maple. Molecular Ecology (Print) , v. 21, p. 3640-3643, 2012.

• DARLING, E. S. ; BARRETT, SPENCER C. H. . Sit-and-wait pollination in the spring flowering woodland plant, Trillium grandiflorum. Journal of Pollination Ecology , v. 5, p. 81-85, 2011.

• NESS, ROB W ; SIOL, MATHIEU ; BARRETT, SPENCER CH . De novo sequence assembly and characterization of the floral transcriptome in cross- and self-fertilizing plants. BMC Genomics , v. 12, p. 298, 2011.

• NESS, R. W. ; GRAHAM, S. W. ; BARRETT, S. C. H. . Reconciling Gene and Genome Duplication Events: Using Multiple Nuclear Gene Families to Infer the Phylogeny of the Aquatic Plant Family Pontederiaceae. Molecular Biology and Evolution , v. 28, p. 3009-3018, 2011.

• COLAUTTI, ROBERT I. ; BARRETT, SPENCER C. H. . POPULATION DIVERGENCE ALONG LINES OF GENETIC VARIANCE AND COVARIANCE IN THE INVASIVE PLANT LYTHRUM SALICARIA IN EASTERN NORTH AMERICA. Evolution (Lancaster, PA.) , v. 65, p. 2514-2529, 2011.

• FRIEDMAN, JANNICE ; BARRETT, SPENCER C. H. . GENETIC AND ENVIRONMENTAL CONTROL OF TEMPORAL AND SIZE-DEPENDENT SEX ALLOCATION IN A WIND-POLLINATED PLANT. Evolution (Lancaster, PA.) , v. 65, p. 2061-2074, 2011.

• YAKIMOWSKI, S. B. ; GLAETTLI, M. ; BARRETT, S. C. H. . Floral dimorphism in plant populations with combined versus separate sexes. Annals of Botany (Print) , v. 108, p. 765-776, 2011.

• BURGESS, KEVIN S. ; FAZEKAS, ARON J. ; KESANAKURTI, PRASAD R. ; GRAHAM, SEAN W. ; HUSBAND, BRIAN C. ; NEWMASTER, STEVEN G. ; PERCY, DIANA M. ; HAJIBABAEI, MEHRDAD ; BARRETT, SPENCER C. H. . Discriminating plant species in a local temperate flora using the rbcL+matK DNA barcode. Methods in Ecology and Evolution , v. 2, p. 333-340, 2011.

• KESANAKURTI, PRASAD R. ; FAZEKAS, ARON J. ; BURGESS, KEVIN S. ; PERCY, DIANA M. ; NEWMASTER, STEVEN G. ; GRAHAM, SEAN W. ; BARRETT, SPENCER C. H. ; HAJIBABAEI, MEHRDAD ; HUSBAND, BRIAN C. . Spatial patterns of plant diversity below-ground as revealed by DNA barcoding. Molecular Ecology (Print) , v. 20, p. 1289-1302, 2011.

• FRIEDMAN, JANNICE ; BARRETT, SPENCER C. H. . The Evolution of Ovule Number and Flower Size in Wind-Pollinated Plants. The American Naturalist , v. 177, p. 246-257, 2011.

• VALLEJO-MARÍN, MARIO ; DORKEN, MARCEL E. ; BARRETT, SPENCER C.H. . The Ecological and Evolutionary Consequences of Clonality for Plant Mating. Annual Review of Ecology, Evolution, and Systematics , v. 41, p. 193-213, 2010.

• COLAUTTI, ROBERT I. ; BARRETT, SPENCER C. H. . Natural Selection and Genetic Constraints on Flowering Phenology in an Invasive Plant. International Journal of Plant Sciences , v. 171, p. 960-971, 2010.

• VALLEJO-MARÍN, MARIO ; DA SILVA, ELIZABETH M. ; SARGENT, RISA D. ; BARRETT, SPENCER C. H. . Trait correlates and functional significance of heteranthery in flowering plants. New Phytologist (Print) , v. 188, p. 418-425, 2010.

• LI, A.-M. ; WU, X.-Q. ; ZHANG, D.-X. ; BARRETT, S. C. H. . Cryptic dioecy in Mussaenda pubescens (Rubiaceae): a species with stigma-height dimorphism. Annals of Botany (Print) , v. 106, p. 521-531, 2010.

• SIOL, MATHIEU ; WRIGHT, STEPHEN I. ; BARRETT, SPENCER C. H. . The population genomics of plant adaptation. New Phytologist (Print) , v. 188, p. 313-332, 2010.

• ZHANG, YUAN-YE ; ZHANG, DA-YONG ; BARRETT, SPENCER C. H. . Genetic uniformity characterizes the invasive spread of water hyacinth ( ), a clonal aquatic plant. Molecular Ecology (Print) , v. 19, p. 1774-1786, 2010.

• COLAUTTI, R. I. ; ECKERT, C. G. ; BARRETT, S. C. H. . Evolutionary constraints on adaptive evolution during range expansion in an invasive plant. Proceedings - Royal Society. Biological Sciences (Print) , v. 277, p. 1799-1806, 2010.

• BARRETT, S. C. H. ; YAKIMOWSKI, S. B. ; FIELD, D. L. ; PICKUP, M. . Ecological genetics of sex ratios in plant populations. Philosophical Transactions - Royal Society. Biological Sciences (Print) , v. 365, p. 2549-2557, 2010.

• BARRETT, S. C. H. . Darwin's legacy: the forms, function and sexual diversity of flowers. Philosophical Transactions - Royal Society. Biological Sciences (Print) , v. 365, p. 351-368, 2010.

• NESS, R. W. ; WRIGHT, S. I. ; BARRETT, S. C. H. . Mating-System Variation, Demographic History and Patterns of Nucleotide Diversity in the Tristylous Plant Eichhornia paniculata. Genetics (Austin, Tex.) , v. 184, p. 381-392, 2010.

• COLAUTTI, ROBERT I. ; WHITE, NEIL A. ; BARRETT, SPENCER C. H. . Variation of Self-Incompatibility within Invasive Populations of Purple Loosestrife ( L.) from Eastern North America. International Journal of Plant Sciences , v. 171, p. 158-166, 2010.

• WRIGHT, S. I. ; BARRETT, S. C. H. . The Long-Term Benefits of Self-Rejection. Science (New York, N.Y.) , v. 330, p. 459-460, 2010.

• BARRETT, S. C. H. . Understanding plant reproductive diversity. Philosophical Transactions - Royal Society. Biological Sciences (Print) , v. 365, p. 99-109, 2009.

• BARRETT, SPENCER C. H. ; NESS, ROB W. ; VALLEJO-MARÍN, MARIO . Evolutionary pathways to self-fertilization in a tristylous plant species. New Phytologist (Print) , v. 183, p. 546-556, 2009.

• HOLLINGSWORTH, P. M. FORREST, L. L. SPOUGE, J. L. HAJIBABAEI, M. RATNASINGHAM, S. VAN DER BANK, M. CHASE, M. W. COWAN, R. S. ERICKSON, D. L. FAZEKAS, A. J. GRAHAM, S. W. JAMES, K. E. KIM, K.-J. KRESS, W. J. SCHNEIDER, H. VAN ALPHENSTAHL, J. BARRETT, S. C.H. VAN DEN BERG, C. BOGARIN, D. BURGESS, K. S. CAMERON, K. M. CARINE, M. CHACON, J. CLARK, A. CLARKSON, J. J. , et al. CONRAD, F. DEVEY, D. S. FORD, C. S. HEDDERSON, T. A.J. HOLLINGSWORTH, M. L. HUSBAND, B. C. KELLY, L. J. KESANAKURTI, P. R. KIM, J. S. KIM, Y.-D. LAHAYE, R. LEE, H.-L. LONG, D. G. MADRINAN, S. MAURIN, O. MEUSNIER, I. NEWMASTER, S. G. PARK, C.-W. PERCY, D. M. PETERSEN, G. RICHARDSON, J. E. SALAZAR, G. A. SAVOLAINEN, V. SEBERG, O. WILKINSON, M. J. YI, D.-K. LITTLE, D. P. ; From the Cover: A DNA barcode for land plants. Proceedings of the National Academy of Sciences of the United States of America , v. 106, p. 12794-12797, 2009.

• FRIEDMAN, J. ; BARRETT, S. C. H. . Wind of change: new insights on the ecology and evolution of pollination and mating in wind-pollinated plants. Annals of Botany (Print) , v. 103, p. 1515-1527, 2009.

• COLAUTTI, ROBERT I. ; MARON, JOHN L. ; BARRETT, SPENCER C. H. . Common garden comparisons of native and introduced plant populations: latitudinal clines can obscure evolutionary inferences. EVOL APPL , v. 2, p. 187-199, 2009.

• FAZEKAS, ARON J. ; KESANAKURTI, PRASAD R. ; BURGESS, KEVIN S. ; PERCY, DIANA M. ; GRAHAM, SEAN W. ; BARRETT, SPENCER C. H. ; NEWMASTER, STEVEN G. ; HAJIBABAEI, MEHRDAD ; HUSBAND, BRIAN C. . Are plant species inherently harder to discriminate than animal species using DNA barcoding markers?. Molecular Ecology Resources (Print) , v. 9, p. 130-139, 2009.

• VALLEJO-MARÍN, M. ; MANSON, J. S. ; THOMSON, J. D. ; BARRETT, S. C. H. . Division of labour within flowers: heteranthery, a floral strategy to reconcile contrasting pollen fates. Journal of Evolutionary Biology (Printed ed.) , v. 22, p. 828-839, 2009.

• VALLEJO-MARIN, M. ; BARRETT, S. C. H. . Modification of flower architecture during early stages in the evolution of self-fertilization. Annals of Botany (Print) , v. 103, p. 951-962, 2009.

• FRIEDMAN, JANNICE ; BARRETT, SPENCER C. H. . The consequences of monoecy and protogyny for mating in wind-pollinated. New Phytologist (Print) , v. 181, p. 489-497, 2009.

• YAKIMOWSKI, SARAH B. ; RYMER, PAUL D. ; STONE, HARRIET ; BARRETT, SPENCER C. H. ; DORKEN, MARCEL E. . Isolation and characterization of 11 microsatellite markers from Sagittaria latifolia (Alismataceae). Molecular Ecology Resources (Print) , v. 9, p. 579-581, 2009.

• STEHLIK, I. ; FRIEDMAN, J. ; BARRETT, S. C. H. . Environmental influence on primary sex ratio in a dioecious plant. Proceedings of the National Academy of Sciences of the United States of America , v. 105, p. 10847-10852, 2008.

• FAZEKAS, ARON J. ; BURGESS, KEVIN S. ; KESANAKURTI, PRASAD R. ; GRAHAM, SEAN W. ; NEWMASTER, STEVEN G. ; HUSBAND, BRIAN C. ; PERCY, DIANA M. ; HAJIBABAEI, MEHRDAD ; BARRETT, SPENCER C. H. . Multiple Multilocus DNA Barcodes from the Plastid Genome Discriminate Plant Species Equally Well. Plos One , v. 3, p. e2802, 2008.

• GLAETTLI, MLANIE ; BARRETT, SPENCER C. H. . Pollinator responses to variation in floral display and flower size in dioecious (Alismataceae). New Phytologist (Print) , v. 179, p. ???-???, 2008.

• FRIEDMAN, J. ; BARRETT, S. C. H. . High Outcrossing in the Annual Colonizing Species Ambrosia artemisiifolia (Asteraceae). Annals of Botany (Print) , v. 101, p. 1303-1309, 2008.

• HODGINS, KATHRYN A. ; BARRETT, SPENCER C. H. . NATURAL SELECTION ON FLORAL TRAITS THROUGH MALE AND FEMALE FUNCTION IN WILD POPULATIONS OF THE HETEROSTYLOUS DAFFODIL. Evolution (Lancaster, PA.) , v. 62, p. 1751-1763, 2008.

• HODGINS, K. A. ; BARRETT, S. C. H. . Geographic variation in floral morphology and style-morph ratios in a sexually polymorphic daffodil. American Journal of Botany , v. 95, p. 185-195, 2008.

• CASE, ANDREA L. ; GRAHAM, SEAN W. ; MACFARLANE, TERRY D. ; BARRETT, SPENCER C. H. . A Phylogenetic Study of Evolutionary Transitions in Sexual Systems in Australasian (Colchicaceae). International Journal of Plant Sciences , v. 169, p. 141-156, 2008.

• WRIGHT, STEPHEN I. ; NESS, ROB W. ; FOXE, JOHN PAUL ; BARRETT, SPENCER C. H. . Genomic Consequences of Outcrossing and Selfing in Plants. International Journal of Plant Sciences , v. 169, p. 105-118, 2008.

• FRIEDMAN, JANNICE ; BARRETT, SPENCER C. H. . A Phylogenetic Analysis of the Evolution of Wind Pollination in the Angiosperms. International Journal of Plant Sciences , v. 169, p. 49-58, 2008.

• BARRETT, SPENCER C. H. . Major Evolutionary Transitions in Flowering Plant Reproduction: An Overview. International Journal of Plant Sciences , v. 169, p. 1-5, 2008.

• HODGINS, KATHRYN A. ; BARRETT, SPENCER C. H. . Asymmetrical mating patterns and the evolution of biased style-morph ratios in a tristylous daffodil. Genetical Research (Print) , v. 90, p. 3-15, 2008.

• BARRETT, SPENCER C. H. ; COLAUTTI, ROBERT I. ; ECKERT, CHRISTOPHER G. . Plant reproductive systems and evolution during biological invasion. Molecular Ecology (Print) , v. 17, p. 373-383, 2008.

• FRIEDMAN, WILLIAM E. ; BARRETT, SPENCER C. H. ; DIGGLE, PAMELA K. ; IRISH, VIVIAN F. ; HUFFORD, LARRY . Whither plant evo-devo?. New Phytologist (Print) , v. 178, p. 468-472, 2008.

• MONTAGUE, J. L. ; BARRETT, S. C. H. ; ECKERT, C. G. . Re-establishment of clinal variation in flowering time among introduced populations of purple loosestrife (Lythrum salicaria, Lythraceae). Journal of Evolutionary Biology (Printed ed.) , v. 21, p. 071119204355004-???, 2007.

• BARRETT, S. C. H. ; CHARLESWORTH, D. . David Graham Lloyd. 20 June 1937 -- 30 May 2007: Elected FRS 1992. Biographical Memoirs of Fellows of the Royal Society , v. 53, p. 203-221, 2007.

• HODGINS, KATHRYN A. ; BARRETT, SPENCER C. H. . Population structure and genetic diversity in tristylous Narcissus triandrus: insights from microsatellite and chloroplast DNA variation. Molecular Ecology (Print) , v. 16, p. 2317-2332, 2007.

• STEHLIK, IVANA ; KRON, PAUL ; BARRETT, SPENCER C. H. ; HUSBAND, BRIAN C. . Sexing pollen reveals female bias in a dioecious plant. New Phytologist (Print) , v. 175, p. 185-194, 2007.

• HODGINS, KATHRYN A. ; STEHLIK, IVANA ; WANG, PAULINE ; BARRETT, SPENCER C. H. . PRIMER NOTE: The development of eight microsatellite loci in the wild daffodil Narcissus triandrus (Amaryllidaceae). Molecular Ecology Notes (Print) , v. 7, p. 510-512, 2007.

• BARRETT, SPENCER C. H. ; CASE, ANDREA L. . TURNER REVIEW No. 11. The ecology and evolution of gender strategies in plants: the example of Australian (Colchicaceae). Australian Journal of Botany (Print) , v. 54, p. 417, 2006.

• VAMOSI, J. C ; VAMOSI, S. M ; BARRETT, S. C.H . Sex in advertising: dioecy alters the net benefits of attractiveness in Sagittaria latifolia (Alismataceae). Proceedings - Royal Society. Biological Sciences (Print) , v. 273, p. 2401-2407, 2006.

• STEHLIK, IVANA ; BARRETT, SPENCER C. H. . POLLINATION INTENSITY INFLUENCES SEX RATIOS IN DIOECIOUS RUMEX NIVALIS, A WIND-POLLINATED PLANT. Evolution (Lancaster, PA.) , v. 60, p. 1207, 2006.

• HODGINS, KATHRYN A. ; BARRETT, SPENCER C. H. . Female reproductive success and the evolution of mating-type frequencies in tristylous populations. New Phytologist (Print) , v. 171, p. 060621052045005-???, 2006.

• STEHLIK, I. ; CASPERSEN, J. P ; BARRETT, S. C.H . Spatial ecology of mating success in a sexually polymorphic plant. Proceedings - Royal Society. Biological Sciences (Print) , v. 273, p. 387-394, 2006.

• HODGINS, K A ; ELDREDGE, NILES . Mating patterns and demography in the tristylous daffodil Narcissus triandrus. Heredity (Edinburgh. Print) , v. 96, p. 262-270, 2006.

• BARRETT, S.C.H . Editorial. Proceedings of the Royal Society B: Biological Sciences , v. 273, p. 385-385, 2006.

• BARRETT, SPENCER C H . [Book Review: The Scientific Papers of G. Ledyard Stebbins (1929-2000). ]. The Quarterly Review of Biology , v. 81, p. 54-55, 2006.

• JESSON, LINLEY K. ; BARRETT, SPENCER C. H. . Experimental tests of the function of mirror-image flowers. Biological Journal of the Linnean Society , v. 85, p. 167-179, 2005.

• ANDERSON, BRUCE ; COLE, WILLIAM W. ; BARRETT, SPENCER C. H. . Botany: Specialized bird perch aids cross-pollination. Nature (London) , v. 435, p. 41-42, 2005.

• STEHLIK, IVANA ; BARRETT, S. C.H. . Mechanisms Governing Sex-Ratio Variation in Dioecious Rumex nivalis. Evolution , v. 59, p. 814, 2005.

• ZHANG, L. ; BARRETT, S. C. H. ; GAO, J.-Y. ; CHEN, J. ; COLE, W. W. ; LIU, Y. ; BAI, Z.-L. ; LI, Q.-J. . Predicting mating patterns from pollination syndromes: the case of 'sapromyiophily' in Tacca chantrieri (Taccaceae). American Journal of Botany , v. 92, p. 517-524, 2005.

• WANG, YONG ; WANG, QING-FENG ; GUO, YOU-HAO ; BARRETT, SPENCER C. H. . Reproductive consequences of interactions between clonal growth and sexual reproduction in Nymphoides peltata: a distylous aquatic plant. New Phytologist (Print) , v. 165, p. 329-336, 2005.

• BARRETT, SPENCER C. H. ; HARDER, LAWRENCE D. . The evolution of polymorphic sexual systems in daffodils (Narcissus). New Phytologist (Print) , v. 165, p. 45-53, 2005.

• MEDRANO, M. ; HERRERA, C. M. ; BARRETT, S. C.H. . Herkogamy and mating patterns in the self-compatible daffodil Narcissus longispathus. Annals of Botany (Print) , v. 95, p. 1105, 2005.

• DORKEN, M. E. ; BARRETT, S. C. H. . Chloroplast haplotype variation among monoecious and dioecious populations of Sagittaria latifolia (Alismataceae) in eastern North America. Molecular Ecology (Print) , v. 13, p. 2699-2707, 2004.

• CESARO, A. C. ; BARRETT, S. C. H. ; MAURICE, S. ; VAISSIERE, B. E. ; THOMPSON, J. D. . An experimental evaluation of self-interference in Narcissus assoanus: functional and evolutionary implications. Journal of Evolutionary Biology (Printed ed.) , v. 17, p. 1367-1376, 2004.

• GRAHAM, S. W. ; BARRETT, S. C. H. . Phylogenetic reconstruction of the evolution of stylar polymorphisms in Narcissus (Amaryllidaceae). American Journal of Botany , v. 91, p. 1007-1021, 2004.

• BARRETT, SPENCER C. H. ; HARDER, LAWRENCE D. ; COLE, W. W. . CORRELATED EVOLUTION OF FLORAL MORPHOLOGY AND MATING-TYPE FREQUENCIES IN A SEXUALLY POLYMORPHIC PLANT. Evolution (Lancaster, PA.) , v. 58, p. 964, 2004.

• BARRETT, S C H ; COLE, W W ; HERRERA, C M . Mating patterns and genetic diversity in the wild Daffodil Narcissus longispathus (Amaryllidaceae). Heredity (Edinburgh. Print) , v. 92, p. 459-465, 2004.

• CASE, ANDREA ; BARRETT, SPENCER C. H. . Floral Biology of Gender Monomorphism and Dimorphism in (Colchicaceae) in Western Australia. International Journal of Plant Sciences , v. 165, p. 289-301, 2004.

• CASE, ANDREA L. ; BARRETT, SPENCER C.H. . Environmental stress and the evolution of dioecy: Wurmbea dioica (Colchicaceae) in Western Australia. Evolutionary Ecology , v. 18, p. 145-164, 2004.

• GRIFFIN, STEVEN R ; BARRETT, SPENCER CH . Genetic variation in (Melanthiaceae), a widespread forest herb in eastern North America. Canadian Journal of Botany (Print) (Cessou em 2007. Cont. ISSN 1916-2790 Botany (Ottawa. Print)) , v. 82, p. 316-321, 2004.

• GRIFFIN, S. R. ; BARRETT, S. C. H. . Post-glacial history of Trillium grandiflorum (Melanthiaceae) in eastern North America: inferences from phylogeography. American Journal of Botany , v. 91, p. 465-473, 2004.

• DORKEN, MARCEL E. ; BARRETT, SPENCER C. H. . Phenotypic plasticity of vegetative and reproductive traits in monoecious and dioecious populations of Sagittaria latifolia (Alismataceae): a clonal aquatic plant. Journal of Ecology (Print) , v. 92, p. 32-44, 2004.

• DORKEN, M. E. ; BARRETT, S. C. H. . Sex determination and the evolution of dioecy from monoecy in Sagittaria latifolia (Alismataceae). Proceedings - Royal Society. Biological Sciences (Print) , v. 271, p. 213-219, 2004.

• DORKEN, MARCEL E. ; BARRETT, SPENCER C. H. . LIFE-HISTORY DIFFERENTIATION AND THE MAINTENANCE OF MONOECY AND DIOECY IN SAGITTARIA LATIFOLIA (ALISMATACEAE). Evolution (Lancaster, PA.) , v. 57, p. 1973, 2003.

• VAMOSI, J. C. ; OTTO, S. P. ; BARRETT, S. C. H. . Phylogenetic analysis of the ecological correlates of dioecy in angiosperms. Journal of Evolutionary Biology (Printed ed.) , v. 16, p. 1006-1018, 2003.

• BARRETT, S. C. H. . Mating strategies in flowering plants: the outcrossing-selfing paradigm and beyond. Philosophical Transactions - Royal Society. Biological Sciences (Print) , v. 358, p. 991-1004, 2003.

• JESSON, LINLEY K. ; BARRETT, SPENCER C. H. . The Comparative Biology of Mirror-Image Flowers. International Journal of Plant Sciences , v. 164, p. S237-S249, 2003.

• JESSON, LINLEY K. ; BARRETT, SPENCER C. H. ; DAY, TROY . A Theoretical Investigation of the Evolution and Maintenance of Mirror-Image Flowers. The American Naturalist , v. 161, p. 916-930, 2003.

• JESSON, L. K. ; KANG, J. ; WAGNER, S. L. ; BARRETT, S. C. H. ; DENGLER, N. G. . The development of enantiostyly. American Journal of Botany , v. 90, p. 183-195, 2003.

• DORKEN, M. E. ; BARRETT, S. C. H. . Gender plasticity in Sagittaria sagittifolia (Alismataceae), a monoecious aquatic species. Plant Systematics and Evolution , v. 237, p. 99-106, 2003.

• THOMPSON, J. D. ; BARRETT, S. C. H. ; BAKER, A. M. . Frequency-dependent variation in reproductive success in Narcissus: implications for the maintenance of stigma-height dimorphism. Proceedings - Royal Society. Biological Sciences (Print) , v. 270, p. 949-953, 2003.

• WORLEY, ANNE C. ; HOULE, DAVID ; BARRETT, SPENCER C. H. . Consequences of Hierarchical Allocation for the Evolution of Life-History Traits. The American Naturalist , v. 161, p. 153-167, 2003.

• CRNOKRAK, PETER ; BARRETT, SPENCER C. H. . PERSPECTIVE: PURGING THE GENETIC LOAD: A REVIEW OF THE EXPERIMENTAL EVIDENCE. Evolution (Lancaster, PA.) , v. 56, p. 2347, 2002.

• GRAHAM, S. W. ; OLMSTEAD, R. G. ; BARRETT, S. C. H. . Rooting Phylogenetic Trees with Distant Outgroups: A Case Study from the Commelinoid Monocots. Molecular Biology and Evolution , v. 19, p. 1769-1781, 2002.

• JESSON, L. K. ; BARRETT, S. C. H. . The genetics of mirror-image flowers. Proceedings - Royal Society. Biological Sciences (Print) , v. 269, p. 1835-1839, 2002.

• JESSON, LINLEY K. ; BARRETT, SPENCER C. H. . Enantiostyly: Solving the puzzle of mirror-image flowers. Nature (London) , v. 417, p. 707-707, 2002.

• BARRETT, SPENCER C. H. . EVOLUTION OF SEXTHE EVOLUTION OF PLANT SEXUAL DIVERSITY. Nature Reviews. Genetics (Print) , v. 3, p. 274-284, 2002.

• BARRETT, S C H . Sexual interference of the floral kind. Heredity (Edinburgh. Print) , v. 88, p. 154-159, 2002.

• ARROYO, J. ; BARRETT, S. C. H. ; HIDALGO, R. ; COLE, W. W. . Evolutionary maintenance of stigma-height dimorphism in Narcissus papyraceus (Amaryllidaceae). American Journal of Botany , v. 89, p. 1242-1249, 2002.

• SLEEMAN, J. D. ; DUDLEY, S. A. ; PANNELL, J. R. ; BARRETT, S. C. H. . Responses of carbon acquisition traits to irradiance and light quality in Mercurialis annua (Euphorbiaceae): evidence for weak integration of plastic responses. American Journal of Botany , v. 89, p. 1388-1400, 2002.

• JESSON, L. K. ; BARRETT, S. C. H. . Enantiostyly in Wachendorfia (Haemodoraceae): the influence of reproductive systems on the maintenance of the polymorphism. American Journal of Botany , v. 89, p. 253-262, 2002.

• DORKEN, MARCEL E. ; FRIEDMAN, JANNICE ; BARRETT, SPENCER C. H. . THE EVOLUTION AND MAINTENANCE OF MONOECY AND DIOECY IN SAGITTARIA LATIFOLIA (ALISMATACEAE). Evolution (Lancaster, PA.) , v. 56, p. 31, 2002.

• GRIFFIN, STEVEN R ; BARRETT, SPENCER C. H. . Factors affecting low seed-ovule ratios in a spring woodland herb, Trillium grandiflorum (Melanthiaceae). International Journal of Plant Biology , v. 163, p. 1-581-590, 2002.

• WORLEY, A. C. ; BARRETT, S. C. H. . Evolution of floral display in Eichhornia paniculata (Pontederiaceae): genetic correlations between flower size and number. Journal of Evolutionary Biology (Printed ed.) , v. 14, p. 469-481, 2001.

• CASE, ANDREA L. ; BARRETT, SPENCER C. H. . ECOLOGICAL DIFFERENTIATION OF COMBINED AND SEPARATE SEXES OF (COLCHICACEAE) IN SYMPATRY. Ecology (Brooklyn, New York, N.Y.) , v. 82, p. 2601-2616, 2001.

• PANNELL, JOHN R. ; BARRETT, SPENCER C.H. . Effects of Population Size and Metapopulation Dynamics on a Mating-System Polymorphism. Theoretical Population Biology (Print) , v. 59, p. 145-155, 2001.

• SARKISSIAN, TALINE S. ; BARRETT, SPENCER C. H. ; HARDER, LAWRENCE D. . GENDER VARIATION IN (ALISMATACEAE): IS SIZE ALL THAT MATTERS?. Ecology (Brooklyn, New York, N.Y.) , v. 82, p. 360-373, 2001.

• SAGE, T . Stigmatic Self-Incompatibility and Mating Patterns in Trillium grandiflorum and Trillium erectum(Melanthiaceae). Annals of Botany (Print) , v. 88, p. 829-841, 2001.

• Barrett, Spencer C. H. . THE LIFE AND TIMES OF PLANT SPECIES: FROM METAPOPULATIONS TO MUTATIONAL MELTDOWN1. Evolution (Lancaster, PA.) , v. 55, p. 641-646, 2001.

• BARRETT, S. C. H. . Herbert George Baker (1920-2001). Taxon , v. 50, p. 1249-1253, 2001.

• BARRETT, S. C. H. . The Baker and Stebbins era comes to a close. Evolution , v. 55, p. 2371-2374, 2001.

• WORLEY, ANNE C. ; BARRETT, SPENCER C. H. . EVOLUTION OF FLORAL DISPLAY IN EICHHORNIA PANICULATA (PONTEDERIACEAE): DIRECT AND CORRELATED RESPONSES TO SELECTION ON FLOWER SIZE AND NUMBER. Evolution (Lancaster, PA.) , v. 54, p. 1533-1545, 2000.

• ARROYO, JUAN ; BARRETT, SPENCER C. H. . Discovery of Distyly in Narcissus (Amaryllidaceae). American Journal of Botany , v. 87, p. 748, 2000.

• BARRETT, S. C. H. ; WILKEN, D. H. ; COLE, W. W. . Heterostyly in the Lamiaceae: The case ofSalvia brandegeei. Plant Systematics and Evolution , v. 223, p. 211-219, 2000.

• BARRETT, S . The Evolution and Function of Stylar Polymorphisms in Flowering Plants. Annals of Botany (Print) , v. 85, p. 253-265, 2000.

• BAKER, ANGELA M ; THOMPSON, JOHN D ; BARRETT, SPENCER C H . Evolution and maintenance of stigma-height dimorphism in Narcissus. I. Floral variation and style-morph ratios. Heredity (Edinburgh. Print) , v. 84, p. 502-513, 2000.

• BAKER, ANGELA M ; THOMPSON, JOHN D ; BARRETT, SPENCER C H . Evolution and maintenance of stigma-height dimorphism in Narcissus. II. Fitness comparisons between style morphs. Heredity (Edinburgh. Print) , v. 84, p. 514-524, 2000.

• BAKER, A. M. ; BARRETT, S. C. H. ; THOMPSON, J. D. . Variation of pollen limitation in the early flowering Mediterranean geophyte Narcissus assoanus (Amaryllidaceae). Oecologia , v. 124, p. 529-535, 2000.

• BIANCHI, M. ; VESPRINI, J. ; BARRETT, S. C. H. . Trimorphic incompatibility in Eichhornia azurea (Pontederiaceae). Sexual Plant Reproduction (Print) , v. 12, p. 203-208, 2000.

• HARDER, L. D. ; BARRETT, S. C. H. ; COLE, W. W. . The mating consequences of sexual segregation within inflorescences of flowering plants. Proceedings - Royal Society. Biological Sciences (Print) , v. 267, p. 315-320, 2000.

• LARSON, BRENDON M. H. ; BARRETT, SPENCER C. H. . A comparative analysis of pollen limitation in flowering plants. Biological Journal of the Linnean Society , v. 69, p. 503-520, 2000.

• WORLEY, ANNE C. ; BAKER, ANGELA M ; BARRETT, SPENCER C. H. . Floral display in Narcissus: variation in flower size and number at the species, population, and individual levels. International Journal of Plant Biology , v. 161, p. 1-69-79, 2000.

• BARRETT, SPENCER C.H. . Advanced plant sex. Trends in Ecology & Evolution (Amsterdam. Print) , v. 15, p. 78-79, 2000.

• BARRETT, SPENCER C. H. ; CASE, ANDREA L. ; PETERS, GREGORY B. . Gender modification and resource allocation in subdioecious Wurmbea dioica (Colchicaceae). Journal of Ecology (Print) , v. 87, p. 123-137, 1999.

• LARSON, BRENDON M. H. ; BARRETT, SPENCER C. H. . The ecology of pollen limitation in buzz-pollinated (Melastomataceae). Journal of Ecology (Print) , v. 87, p. 371-381, 1999.

• LARSON, BRENDON M. H. ; BARRETT, SPENCER C. H. . The Pollination Ecology of Buzz-Pollinated Rhexia virginica (Melastomataceae). American Journal of Botany , v. 86, p. 502, 1999.

• SAGE, TAMMY L. ; STRUMAS, FANNY ; COLE, WILLIAM W. ; BARRETT, SPENCER C. H. . Differential Ovule Development Following Self- and Cross-Pollination: The Basis of Self-Sterility in Narcissus triandrus (Amaryllidaceae). American Journal of Botany , v. 86, p. 855, 1999.

• WRIGHT, S. I. ; BARRETT, S. C. H. . Size-dependent gender modification in a hermaphroditic perennial herb. Proceedings of the Royal Society B: Biological Sciences , v. 266, p. 225-232, 1999.

• BARRETT, S. C. H. . Book review: Plant Variation and Evolution by D. Briggs; S. M. Walters. The Quarterly Review of Biology , v. 74, p. 82-82, 1999.

• LARSON, BRENDON M.H. ; BARRETT, SPENCER C.H. . Reproductive biology of island and mainland populations of Primula mistassinica (Primulaceae) on Lake Huron shorelines. Canadian Journal of Botany (Online) , v. 76, p. 1819-1827, 1998.

• BARRETT, SPENCER C.H. . The evolution of mating strategies in flowering plants. Trends in Plant Science , v. 3, p. 335-341, 1998.

• HUSBAND, BRIAN C. ; BARRETT, SPENCER C. H. . Spatial and temporal variation in population size of Eichhornia paniculata in ephemeral habitats: implications for metapopulation dynamics. Journal of Ecology , v. 86, p. 1021-1031, 1998.

• HUSBAND, BRIAN C. ; BARRETT, S. C.H. . Baker?s Law revisited: reproductive assurance in a metapopulation. Evolution , v. 86, p. 1021-1031, 1998.

• GRAHAM, SEAN W. . Phylogenetic Congruence and Discordance Among One Morphological and Three Molecular Data Sets from Pontederiaceae. Systematic Biology , v. 47, p. 545-567, 1998.

• CROY, RON ; BARRETT, SPENCER C H ; AMOS, BILL . Book Reviews. Heredity (Edinburgh. Print) , v. 80, p. 259-263, 1998.

• BARRETT, S. C. H. ; HUSBAND, B. C. . Ecology and Genetics of Ephemeral Plant Populations: Eichhornia paniculata (Pontederiaceae) in Northeast Brazil. Journal of Heredity , v. 88, p. 277-284, 1997.

• BARRETT, SPENCER C H ; COLE, WILLIAM W ; ARROYO, JUAN ; CRUZAN, MITCHELL B ; LLOYD, DAVID G . Sexual polymorphisms in Narcissus triandrus (Amaryllidaceae): is this species tristylous?. Heredity , v. 78, p. 135-145, 1997.

• BARRETT, S. C. H. ; EMERSON, B. ; MALLET, J. . The Reproductive Biology and Genetics of Island Plants [and Discussion]. Philosophical Transactions - Royal Society. Biological Sciences (Print) , v. 351, p. 725-733, 1996.

• BARRETT, S. C. H. ; HARDER, L. D. ; WORLEY, A. C. . The Comparative Biology of Pollination and Mating in Flowering Plants. Philosophical Transactions - Royal Society. Biological Sciences (Print) , v. 351, p. 1271-1280, 1996.

• BARRETT, SPENCER C.H. ; HARDER, LAWRENCE D. . Ecology and evolution of plant mating. Trends in Ecology & Evolution (Amsterdam. Print) , v. 11, p. 73-79, 1996.

• CRUZAN, MITCHELL B. ; BARRETT, SPENCER C. H. . Postpollination Mechanisms Influencing Mating Patterns and Fecundity: An Example from Eichhornia paniculata. The American Naturalist , v. 147, p. 576, 1996.

• ECKERT, CHRISTOPHER G. ; MANICACCI, DOMENICA ; BARRETT, SPENCER C. H. . Genetic Drift and Founder Effect in Native Versus Introduced Populations of an Invading Plant, Lythrum salicaria (Lythraceae). Evolution (Lancaster, PA.) , v. 50, p. 1512, 1996.

• ECKERT, CHRISTOPHER G ; MANICACCI, DOMENICA ; BARRETT, SPENCER C H . Frequency-dependent selection on morph ratios in tristylous Lythrum salicaria (Lythraceae). Heredity (Edinburgh. Print) , v. 77, p. 581-588, 1996.

• HUSBAND, BRIAN C. ; BARRETT, SPENCER C. H. . A Metapopulation Perspective in Plant Population Biology. Journal of Ecology (Print) , v. 84, p. 461, 1996.

• KOHN, JOSHUA R. ; GRAHAM, SEAN W. ; MORTON, BRIAN ; DOYLE, JEFF J. ; BARRETT, SPENCER C. H. . Reconstruction of the Evolution of Reproductive Characters in Pontederiaceae Using Phylogenetic Evidence from Chloroplast DNA Restriction-Site Variation. Evolution (Lancaster, PA.) , v. 50, p. 1454, 1996.

• MANICACCI, DOMENICA ; BARRETT, SPENCER C. H. . Fertility Differences Among Floral Morphs Following Selfing in Tristylous Eichhornia paniculata (Pontederiaceae): Inbreeding Depression or Partial Incompatibility?. American Journal of Botany , v. 83, p. 594, 1996.

• BARRETT, S. C. H. . Obituary - Professor Abilio Fernandes. Daffodil & Tulip Year Book 1996-7, Royal Horticultural Society, London , v. 1, p. 53-56, 1996.

• BARRETT, S. C.H. . Mating-system evolution in flowering plants: micro- and macroevolutionary approaches. Acta Botanica Neerlandica , v. 44, p. 385-402, 1995.

• ECKERT, CHRISTOPHER G. ; BARRETT, SPENCER C. H. . Style Morph Ratios in Tristylous Decodon Verticillatus (Lythraceae): Selection vs. Historical Contingency. Ecology (Brooklyn, New York, N.Y.) , v. 76, p. 1051, 1995.

• FENSTER, CHARLES B ; DIGGLE, PAMELA K ; BARRETT, SPENCER C H ; RITLAND, KERMIT . The genetics of floral development differentiating two species of Mimulus (Scrophulariaceae). Heredity (Edinburgh. Print) , v. 74, p. 258-266, 1995.

• HARDER, LAWRENCE D. ; BARRETT, SPENCER C. H. . Mating cost of large floral displays in hermaphrodite plants. Nature (London) , v. 373, p. 512-515, 1995.

• HUSBAND, BRIAN C ; BARRETT, SPENCER C H . Estimates of gene flow in Eichhornia paniculata (Pontederiaceae): effects of range substructure. Heredity (Edinburgh. Print) , v. 75, p. 549-560, 1995.

• HUSBAND, BRIAN C. ; BARRETT, SPENCER C. H. . Estimating Effective Population Size: A Reply to Nunney. Evolution (Lancaster, PA.) , v. 49, p. 392, 1995.

• MANICACCI, DOMENICA ; BARRETT, SPENCER C. H. . Stamen Elongation, Pollen Size, and Siring Ability in Tristylous Eichhornia paniculata (Pontederiaceae). American Journal of Botany , v. 82, p. 1381, 1995.

• MANICACCI, DOMENICA ; BARRETT, S. C. H. . Effects of flower number and position on self-fertilization in experimental populations of Eichhornia paniculata (Pontederiaceae). Functional Ecology (Print) , v. 82, p. 1381-1389, 1994.

• ECKERT, CHRISTOPHER G. ; BARRETT, SPENCER C. H. . Tristyly, self-compatibility and floral variation in Decodon verticillatus (Lythraceae). Biological Journal of the Linnean Society , v. 53, p. 1-30, 1994.

• ECKERT, CHRISTOPHER G ; BARRETT, SPENCER C H . Post-pollination mechanisms and the maintenance of outcrossing in self-compatible, tristylous, Decodon verticillatus (Lythraceae). Heredity , v. 72, p. 396-411, 1994.

• ECKERT, CHRISTOPHER G. ; BARRETT, SPENCER C. H. . Inbreeding Depression in Partially Self-Fertilizing Decodon verticillatus (Lythraceae): Population-Genetic and Experimental Analyses. Evolution (Lancaster, PA.) , v. 48, p. 952, 1994.

• FENSTER, CHARLES B ; BARRETT, SPENCER C H . Inheritance of mating-system modifier genes in Eichhornia paniculata (Pontederiaceae). Heredity , v. 72, p. 433-445, 1994.

• KOHN, JOSHUA R. ; BARRETT, SPENCER C. H. . Pollen Discounting and the Spread of a Selfing Variant in Tristylous Eichhornia paniculata: Evidence from Experimental Populations. Evolution (Lancaster, PA.) , v. 48, p. 1576, 1994.

• SCRIBAILO, R.W. ; BARRETT, S.C.H. . Effects of prior self-pollination on outcrossed seed set in tristylous Pontederia sagittata (Pontederiaceae). Sexual Plant Reproduction , v. 7, p. 273-281, 1994.

• BARRETT, S. C. H. . Book Review: The Natural History of Inbreeding and Outbreeding: Theoretical and Empirical Perspectives. Edited by N.W. Thornhill.. The Quarterly Review of Biology , v. 69, p. 400, 1994.

• BARRETT, S. C.H. . Book Review: Genes in Ecology. Edited by R.J. Berry, T.J. Crawford & G.M. Hewitt. The Quarterly Review of Biology , v. 69, p. 291-292, 1994.

• BARRETT, SPENCER C.H. ; ECKERT, CHRISTOPHER G. ; HUSBAND, BRIAN C. . Evolutionary processes in aquatic plant populations. Aquatic Botany , v. 44, p. 105-145, 1993.

• BARRETT, SPENCER C.H. ; HUSBAND, BRIAN C. ; COLE, WILLIAM W. . Variation in Outcrossing Rates in Eichhornia paniculata: Temporal Changes in Populations of Contrasting Style Morph Structure. Plant Species Biology , v. 8, p. 141-148, 1993.

• BUSH, ELIZABETH J. ; BARRETT, SPENCER C. H. . Genetics of mine invasions by (Poaceae). Canadian Journal of Botany (Print) (Cessou em 2007. Cont. ISSN 1916-2790 Botany (Ottawa. Print)) , v. 71, p. 1336-1348, 1993.

• CRUZAN, MITCHELL B. ; BARRETT, SPENCER C. H. . Contribution of Cryptic Incompatibility to the Mating System of Eichhornia paniculata (Pontederiaceae). Evolution (Lancaster, PA.) , v. 47, p. 925, 1993.

• ECKERT, CHRISTOPHER G ; BARRETT, SPENCER C H . The inheritance of tristyly in Decodon verticillatus (Lythraceae). Heredity , v. 71, p. 473-480, 1993.

• HARDER, LAWRENCE D. ; BARRETT, SPENCER C. H. . Pollen Removal From Tristylous Pontederia Cordata: Effects of Anther Position and Pollinator Specialization. Ecology (Brooklyn, New York, N.Y.) , v. 74, p. 1059, 1993.

• HUSBAND, BRIAN C. ; BARRETT, SPENCER C. H. . Multiple origins of self-fertilization in tristylous Eichhornia paniculata (Pontederiaceae): Inferences from style morph and isozyme variation. Journal of Evolutionary Biology (Printed ed.) , v. 6, p. 591-608, 1993.

• CHASE, MARK W. SOLTIS, DOUGLAS E. OLMSTEAD, RICHARD G. MORGAN, DAVID LES, DONALD H. MISHLER, BRENT D. DUVALL, MELVIN R. PRICE, ROBERT A. HILLS, HAROLD G. QIU, YIN-LONG KRON, KATHLEEN A. RETTIG, JEFFREY H. CONTI, ELENA PALMER, JEFFREY D. MANHART, JAMES R. SYTSMA, KENNETH J. MICHAELS, HELEN J. KRESS, W. JOHN KAROL, KENNETH G. CLARK, W. DENNIS HEDREN, MIKAEL GAUT, BRANDON S. JANSEN, ROBERT K. KIM, KI-JOONG WIMPEE, CHARLES F. , et al. SMITH, JAMES F. FURNIER, GLENN R. STRAUSS, STEVEN H. XIANG, QUI-YUN PLUNKETT, GREGORY M. SOLTIS, PAMELA S. SWENSEN, SUSAN M. WILLIAMS, STEPHEN E. GADEK, PAUL A. QUINN, CHRISTOPHER J. EGUIARTE, LUIS E. GOLENBERG, EDWARD LEARN, GERALD H. GRAHAM, SEAN W. BARRETT, SPENCER C. H. DAYANANDAN, SELVADURAI ALBERT, VICTOR A. ; Phylogenetics of Seed Plants: An Analysis of Nucleotide Sequences from the Plastid Gene rbcL. Annals of the Missouri Botanical Garden , v. 80, p. 528, 1993.

• ECKERT, CHRISTOPHER G. ; BARRETT, SPENCER C. H. . Clonal Reproduction and Patterns of Genotypic Diversity in Decodon verticillatus (Lythraceae). American Journal of Botany , v. 80, p. 1175, 1993.

• BARRETT, SPENCER C. H. . Gender variation and the evolution of dioecy in Wurmbea dioica (Liliaceae). Journal of Evolutionary Biology (Printed ed.) , v. 5, p. 423-444, 1992.

• BARRETT, SPENCER C. H. ; HARDER, LAWRENCE D. . Floral variation in Eichhornia paniculata (Spreng.) Solms (Pontederiaceae) II. Effects of development and environment on the formation of selfing flowers. Journal of Evolutionary Biology (Printed ed.) , v. 5, p. 83-107, 1992.

• ECKERT, CHRISTOPHER G. ; BARRETT, SPENCER C. H. . Stochastic Loss of Style Morphs from Populations of Tristylous Lythrum salicaria and Decodon verticillatus (Lythraceae). Evolution (Lancaster, PA.) , v. 46, p. 1014, 1992.

• HUSBAND, BRIAN C. ; BARRETT, SPENCER C. H. . Effective Population Size and Genetic Drift in Tristylous Eichhornia paniculata (Pontederiaceae). Evolution (Lancaster, PA.) , v. 46, p. 1875, 1992.

• HUSBAND, BRIAN C ; BARRETT, SPENCER C H . Genetic drift and the maintenance of the style length polymorphism in tristylous populations of Eichhornia paniculata (Pontederiaceae). Heredity , v. 69, p. 440-449, 1992.

• HARDER, L. D. ; BARRETT, S. C. H. . The Energy Cost of Bee Pollination for Pontederia cordata (Pontederiaceae). Functional Ecology (Print) , v. 6, p. 226, 1992.

• KOHN, J. R. ; BARRETT, S. C. H. . Floral Manipulations Reveal the Cause of Male Fitness Variation in Experimental Populations of Eichhornia paniculata (Pontederiaceae). Functional Ecology (Print) , v. 6, p. 590, 1992.

• HUSBAND, BRIAN C ; BARRETT, S. C. H. . Pollinator visitation in populations of tristylous Eichhornia paniculata (Pontederiaceae) in northeastern Brazil. Oecologia , v. 89, p. 365, 1992.

• KOHN, JOSHUA R. ; BARRETT, SPENCER C. H. . Experimental Studies on the Functional Significance of Heterostyly. Evolution (Lancaster, PA.) , v. 46, p. 43, 1992.

• BARRETT, S. C.H. . Book Review: Narcissus by M. Jefferson-Brown. The Quarterly Review of Biology , v. 67, p. 213, 1992.

• BARRETT, S. C. H. ; CHARLESWORTH, D. . Effects of a change in the level of inbreeding on the genetic load. Nature (London) , v. 352, p. 522-524, 1991.

• SCRIBAILO, R. ; BARRETT, S. C. H. . Pollen-pistil interactions in tristylous Pontederia sagittata Presl. (Pontederiaceae). I. Floral heteromorphism and structural features of the pollen tube pathway.. American Journal of Botany , v. 78, p. 163-1661, 1991.

• SCRIBAILO, ROBIN W. ; BARRETT, SPENCER C. H. . Pollen-Pistil Interactions in Tristylous Pontederia sagittata (Pontederiaceae). II. Patterns of Pollen Tube Growth. American Journal of Botany , v. 78, p. 1662, 1991.

• HUSBAND, BRIAN C ; BARRETT, SPENCER C H . Colonization history and population genetic structure of Eichhornia paniculata in Jamaica. Heredity , v. 66, p. 287-296, 1991.

• BARRETT, SPENCER C. H. ; HUSBAND, BRIAN C. . Variation in Outcrossing Rates in Eichhornia paniculata: The Role of Demographic and Reproductive Factors*. Plant Species Biology , v. 5, p. 41-55, 1990.

• BARRETT, S. C. H. ; ECKERT, CHRISTOPHER G . Current issues in plant reproductive ecology. Israeli Journal of Botany , v. 39, p. 5, 1990.

• MORGAN, MARTIN T ; BARRETT, SPENCER C H . Outcrossing rates and correlated mating within a population of Eichhornia paniculata (Pontederiaceae). Heredity , v. 64, p. 271-280, 1990.

• SHORE, JOEL S ; BARRETT, SPENCER C H . Quantitative genetics of floral characters in homostylous Turnera ulmifolia var. angustifolia Willd. (Turneraceae). Heredity , v. 64, p. 105-112, 1990.

• SEBURN, CAROLYN N. L. ; DICKINSON, TIMOTHY A. ; BARRETT, SPENCER C. H. . Floral variation in Eichhornia paniculata (Spreng.) Solms (Pontederiaceae): I. Instability of stamen position in genotypes from northeast Brazil. Journal of Evolutionary Biology (Printed ed.) , v. 3, p. 103-123, 1990.

• BARRETT, SPENCER C.H. . The evolution and adaptive significance of heterostyly. Trends in Ecology & Evolution (Amsterdam. Print) , v. 5, p. 144-148, 1990.

• BARRETT, SPENCER C. H. ; MORGAN, MARTIN T. ; HUSBAND, BRIAN C. . The Dissolution of a Complex Genetic Polymorphism: The Evolution of Self-Fertilization in Tristylous Eichhornia paniculata (Pontederiaceae). Evolution (Lancaster, PA.) , v. 43, p. 1398, 1989.

• MORGAN, MARTIN T. ; BARRETT, SPENCER C. H. . Reproductive correlates of mating system variation in Eichhornia paniculata (Spreng.) Solms (Pontederiaceae). Journal of Evolutionary Biology (Printed ed.) , v. 2, p. 183-203, 1989.

• WOLFE, LORNE M. ; BARRETT, SPENCER C. H. . Patterns of pollen removal and deposition in tristylous Pontederia cordata L. (Pontederiaceae). Biological Journal of the Linnean Society , v. 36, p. 317-329, 1989.

• BARRETT, SPENCER C. H. . Waterweed invasions. Scientific American , v. 260, p. 90, 1989.

• BARRETT, SPENCER C. H. . Evolution of Breeding Systems in Eichhornia (Pontederiaceae): A Review. Annals of the Missouri Botanical Garden , v. 75, p. 741, 1988.

• MORGAN, MARTIN T. ; BARRETT, SPENCER C. H. . Historical Factors and Anisoplethic Population Structure in Tristylous Pontederia cordata: A Reassessment. Evolution (Lancaster, PA.) , v. 42, p. 496, 1988.

• WOLFE, LORNE M. ; BARRETT, SPENCER C. H. . Temporal changes in the pollinator fauna of tristylous , an aquatic plant. Canadian Journal of Zoology (Print) , v. 66, p. 1421-1424, 1988.

• Barrett, Spencer C. H. ; RICHARDS, A. J. . Plant Breeding Systems. Evolution (Lancaster, PA.) , v. 42, p. 206, 1988.

• WOLFE, L. M. ; BARRETT, S. C. H. . Pollinator foraging behavior and pollen collection on the floral morphs of tristylous Pontederia cordata L.. Oecologia , v. 74, p. 347-351, 1987.

• BARRETT, SPENCER C. H. ; SHORE, JOEL S. . Variation and Evolution of Breeding Systems in the Turnera ulmifolia L. Complex (Turneraceae). Evolution (Lancaster, PA.) , v. 41, p. 340, 1987.

• BARRETT, S C H ; BROWN, A H D ; SHORE, J S . Disassortative mating in tristylous Eichhornia paniculata (Pontederiaceae). Heredity , v. 58, p. 49-55, 1987.

• BARRETT, SPENCER C.H. ; HELENURM, KAIUS . The reproductive biology of boreal forest herbs. I. Breeding systems and pollination. Botany (Ottawa. Online) , v. 65, p. 2036-2046, 1987.

• HELENURM, KAIUS ; BARRETT, SPENCER C.H. . The reproductive biology of boreal forest herbs. II. Phenology of flowering and fruiting. Botany (Ottawa. Online) , v. 65, p. 2047-2056, 1987.

• GLOVER, D E ; BARRETT, S C H . Genetic variation in continental and island populations of Eichhornia paniculata (Pontederiaceae). Heredity , v. 59, p. 7-17, 1987.

• SHORE, J. S. ; BARRETT, S. C. H. . Inheritance of floral and isozyme polymorphisms in Turnera ulmifolia L. Journal of Heredity , v. 78, p. 44-48, 1987.

• RICHARDS, JENNIFER H. ; BARRETT, SPENCER C. H. . Development of Tristyly in Pontederia cordata (Pontederiaceae). I. Mature Floral Structure and Patterns of Relative Growth of Reproductive Organs. American Journal of Botany , v. 74, p. 1831, 1987.

• BARRETT, S. C.H . Mimicry in Plants. Scientific American , v. 255, p. 1-76-83, 1987.

• GLOVER, D. E. ; BARRETT, S. C. H. . Stigmatic pollen loads in populations of Pontederia cordata populations from the southern U.S. American Journal of Botany , v. 73, p. 1601, 1986.

• SHORE, J. S. ; BARRETT, S. C. H. . Genetic modifications of dimorphic incompatibility in the Turnera ulmifolia L. complex (Turneraceae).. Canadian Journal of Genetics and Cytology , v. 28, p. 796, 1986.

• ANDERSON, J. M. ; BARRETT, S. C. H. . Pollen tube growth in tristylous (Pontederiaceae). Canadian Journal of Botany (Print) (Cessou em 2007. Cont. ISSN 1916-2790 Botany (Ottawa. Print)) , v. 64, p. 2602-2607, 1986.

• GLOVER, DEBORAH E. ; BARRETT, SPENCER C. H. . Variation in the Mating System of Eichhornia paniculata (Spreng.) Solms. (Pontederiaceae). Evolution (Lancaster, PA.) , v. 40, p. 1122, 1986.

• MAUN, M. A. ; BARRETT, S. C. H. . THE BIOLOGY OF CANADIAN WEEDS.: 77. (L.) Beauv.. Canadian Journal of Plant Science , v. 66, p. 739-759, 1986.

• ECKENWALDER, JAMES E. ; BARRETT, SPENCER C. H. . Phylogenetic Systematics of Pontederiaceae. Systematic Botany , v. 11, p. 373, 1986.

• Barrett, S. C. H. . Plant Population Biology: Genetic Differentiation and Dispersal in Plants.. Science (New York, N.Y.) , v. 232, p. 1279-1279, 1986.

• SHORE, JOEL S ; BARRETT, SPENCER C H . The genetics of distyly and homostyly in Turners ulmifolia L. (Turneraceae). Heredity , v. 55, p. 167-174, 1985.

• BARRETT, S. C.H. ; ANDERSON, J. M. . Variation in expression of trimorphic incompatibility in Pontederia cordata L. (Pontederiaceae).. Theoretical and Applied Genetics , v. 70, p. 355-362, 1985.

• BARRETT, SPENCER C. H. ; SHORE, JOEL S. . Dimorphic Incompatibility in Turnera Hermannioides Camb. (Turneraceae). Annals of the Missouri Botanical Garden , v. 72, p. 259, 1985.

• BARRETT, SPENCER C. H. ; GLOVER, DEBORAH E. . On the Darwinian Hypothesis of the Adaptive Significance of Tristyly. Evolution (Lancaster, PA.) , v. 39, p. 766, 1985.

• SHORE, JOEL S. ; BARRETT, SPENCER C. H. . Morphological Differentiation and Crossability among Populations of the Turnera ulminfolia L. Complex (Turneraceae). Systematic Botany , v. 10, p. 308, 1985.

• BARRETT, S. C. H. . Floral trimorphism and monomorphism in continental and island populations of Eichhornia paniculata (Spreng.) Solms. (Pontederiaceae). Biological Journal of the Linnean Society , v. 25, p. 41-60, 1985.

• Barrett, Spencer C. H. . Book Review:Plant Variation and Evolution. D. Briggs, S. M. Walters. The Quarterly Review of Biology , v. 60, p. 505, 1985.

• BARRETT, S. C.H . Book Review: How Flowers Work: A Guide to Plant Biology by B. Gibbons. The Quarterly Review of Biology , v. 57, p. 199, 1985.

• RICHARDS, JENNIFER H. ; BARRETT, SPENCER C. H. . The Developmental Basis of Tristyly in Eichhornia paniculata (Pontederiaceae). American Journal of Botany , v. 71, p. 1347, 1984.

• PRICE, STEVEN D. ; BARRETT, SPENCER C. H. . The function and adaptive significance of tristyly in Pontederia cordata L. (Pontederiaceae). Biological Journal of the Linnean Society , v. 21, p. 315-329, 1984.

• SHORE, JOEL S. ; BARRETT, SPENCER C. H. . The effect of pollination intensity and incompatible pollen on seed set in (Turneraceae). Canadian Journal of Botany (Print) (Cessou em 2007. Cont. ISSN 1916-2790 Botany (Ottawa. Print)) , v. 62, p. 1298-1303, 1984.

• BARRETT, S. C.H . Rice mimicry in Barnyard Grass. Weeds Today , v. 15, p. 6, 1984.

• GLOVER, D. E. ; BARRETT, S. C. H. . TRIMORPHIC INCOMPATIBILITY IN MEXICAN POPULATIONS OF PONTEDERIA SAGITTATA PRESL. (PONTEDERIACEAE). New Phytologist (Print) , v. 95, p. 439-455, 1983.

• BARRETT, SPENCER H. . Crop mimicry in weeds. Economic Botany , v. 37, p. 255-282, 1983.

• BARRETT, SPENCER C. H. ; WILSON, BLAKE F. . Colonizing ability in the complex (barnyard grass). II. Seed biology. Canadian Journal of Botany (Print) (Cessou em 2007. Cont. ISSN 1916-2790 Botany (Ottawa. Print)) , v. 61, p. 556-562, 1983.

• BARRETT, S.C.H. ; FORNO, I.W. . Style morph distribution in new world populations of Eichhornia crassipes (Mart.) Solms-Laubach (water hyacinth). Aquatic Botany , v. 13, p. 299-306, 1982.

• PRICE, STEVEN D. ; BARRETT, SPENCER C. H. . Tristyly in (Pontederiaceae). Canadian Journal of Botany (Print) (Cessou em 2007. Cont. ISSN 1916-2790 Botany (Ottawa. Print)) , v. 60, p. 897-905, 1982.

• BARRETT, SPENCER C.H. ; THOMSON, JAMES D. . Spatial pattern, floral sex ratios, and fecundity in dioecious Aralia nudicaulis (Araliaceae). Botany (Ottawa. Online) , v. 60, p. 1662-1670, 1982.

• BARRETT, SPENCER C. H. ; WILSON, BLAKE F. . Colonizing ability in the - complex (barnyard grass). I. Variation in life history. Canadian Journal of Botany (Print) (Cessou em 2007. Cont. ISSN 1916-2790 Botany (Ottawa. Print)) , v. 59, p. 1844-1860, 1981.

• BARRETT, SPENCER C. H. ; HELENURM, KAIUS . Floral Sex Ratios and Life History in Aralia nudicaulis (Araliaceae). Evolution (Lancaster, PA.) , v. 35, p. 752, 1981.

• THOMSON, JAMES D. ; BARRETT, SPENCER C. H. . Temporal Variation of Gender in Aralia hispida Vent. (Araliaceae). Evolution (Lancaster, PA.) , v. 35, p. 1094, 1981.

• THOMSON, JAMES D. ; BARRETT, SPENCER C. H. . Selection for Outcrossing, Sexual Selection, and the Evolution of Dioecy in Plants. The American Naturalist , v. 118, p. 443, 1981.

• BARRETT, S. C.H . Book Review: One Hundred Families of Flowering Plants by M. Hickey and C.J. King. The Quarterly Review of Biology , v. 57, p. 199, 1981.

• BARRETT, S. C.H. . Dimorphic incompatibility and gender in (Menyanthaceae). Canadian Journal of Botany (Print) (Cessou em 2007. Cont. ISSN 1916-2790 Botany (Ottawa. Print)) , v. 58, p. 1938-1942, 1980.

• BARRETT, SPENCER C.H. ; SEAMAN, DONALD E. . The weed flora of Californian rice fields. Aquatic Botany , v. 9, p. 351-376, 1980.

• KENNEDY, ROBERT A. ; BARRETT, SPENCER C. H. ; VANDER ZEE, DELMAR ; RUMPHO, MARY E. . Germination and seedling growth under anaerobic conditions in Echinochloa crus-galli (barnyard grass).. Plant, Cell and Environment (Print) , v. 3, p. 243-248, 1980.

• BARRETT, S. C. H. . Sexual Reproduction in Eichhornia crassipes (Water Hyacinth). I. Fertility of Clones from Diverse Regions. Journal of Applied Ecology (Print) , v. 17, p. 101, 1980.

• BARRETT, S. C. H. . Sexual Reproduction in Eichhornia crassipes (Water Hyacinth). II. Seed Production in Natural Populations. Journal of Applied Ecology (Print) , v. 17, p. 113, 1980.

• BARRETT, SPENCER C. H. . The Evolutionary Breakdown of Tristyly in Eichhornia crassipes (Mart.) Solms (Water Hyacinth). Evolution (Lancaster, PA.) , v. 33, p. 499, 1979.

• BARRETT, SPENCER C. H. ; STROTHER, JOHN L. . Taxonomy and Natural History of Bacopa (Scrophulariaceae) in California. Systematic Botany , v. 3, p. 408, 1978.

• BARRETT, S. C. H. . Heterostyly in a tropical weed: the reproductive biology of the complex (Turneraceae). Canadian Journal of Botany (Print) (Cessou em 2007. Cont. ISSN 1916-2790 Botany (Ottawa. Print)) , v. 56, p. 1713-1725, 1978.

• BARRETT, S.C.H. . Floral biology of Eichhornia azurea (Swartz) Kunth (Pontederiaceae). Aquatic Botany , v. 5, p. 217-228, 1978.

• Barrett, Spencer C. H. ; HUTCHINSON, G. EVELYN . An Introduction to Population Ecology.. Systematic Botany , v. 3, p. 349, 1978.

• BARRETT, SPENCER C. H. . Tristyly in Eichhornia crassipes (Mart.) Solms (Water Hyacinth). Biotropica (Lawrence, KS) , v. 9, p. 230, 1977.

• BARRETT, S. C. H. . THE BREEDING SYSTEM OF PONTEDERIA ROTUNDIFOLIA L., A TRISTYLOUS SPECIES. New Phytologist (Online) , v. 78, p. 209-220, 1977.

• PICKERSGILL, BARBARA ; BARRETT, SPENCER C. H. ; DE ANDRADE-LIMA, DARDANO . Wild Cotton in Northeast Brazil. Biotropica (Lawrence, KS) , v. 7, p. 42, 1975.

• BARRETT, S. C. H. . Major Evolutionary Transitions in Flowering Plant Reproduction. 1. ed. Chicago: University of Chicago Press, 2008. v. 1. 216p .

• HARDER, LAWRENCE D. ; BARRETT, S.C.H. . Ecology and Evolution of Flowers. 1. ed. Oxford, U.K: Oxford University Press, 2006. v. 1. 384p .

• LLOYD, DAVID G ; BARRETT, S. C.H. . Floral Biology: Studies on Floral Evolution in Animal-Pollinated Plants. 1. ed. New York, NY: Chapman & Hall, 1996. v. 1. 410p .

• BARRETT, S. C. H. . Evolution and function of Heterostyly. 1. ed. Berlin: Springer-Verlag, 1992. v. 1. 279p .

• BARRETT, S.C.H. . Evolution of Mating Systems: Outcrossing versus Selfing. In: David A. Baum, Douglas J. Futuyma, Hopi E. Hoekstra, Richard E. Lenski, Allen J. Moore, Catherine L. Peichel, Dolph Schluter & Michael C. Whitlock. (Org.). The Princeton Guide to Evolution. 1ed.Princeton: Princeton University Press, 2014, v. 1, p. 356-362.

• BARRETT, S. C.H . Reproductive systems: Plant. In: D. Simberloff & M. Rejamanek. (Org.). Encyclopedia of Biological Invasions. 1ed.Berkeley: University of California Press, 2011, v. 1, p. 584-590.

• Barrett, Spencer C. H. . Why Reproductive Systems Matter for the Invasion Biology of Plants. Fifty Years of Invasion Ecology. 1ed.Oxford, U.K: Wiley-Blackwell, 2010, v. , p. 195-210.

• Barrett, S. C. H. ; SHORE, J. S. . New Insights on Heterostyly: Comparative Biology, Ecology and Genetics. Self-Incompatibility in Flowering Plants. 1ed.: Springer Berlin Heidelberg, 2008, v. , p. 3-32.

• BARRETT, S. C. H. ; HODGINS, KATHRYN A. . Floral design and the evolution of asymmetrical mating. Ecology and Evolution of Flowers. 1ed.Oxford, U.K: Oxford University Press, 2006, v. 1, p. 239-255.

• BARRETT, S.C.H. ; HARDER, LAWRENCE D. . David G. Lloyd and the evolution of floral biology: from natural history to strategic analysis. In: Eds. L.D. Harder & S.C.H. Barrett. (Org.). Ecology and Evolution of Flowers. 1ed.Oxford, U.K: Oxford University Press, 2006, v. 1, p. 1-21.

• BARRETT, S. C.H. . Flower diversity and plant mating strategies. In: McGraw Hill Inc. (Org.). McGraw-Hill Yearbook of Science & Technology. 1ed.New York, NY: McGraw Hill Inc, 2004, v. 1, p. 110-113.

• BARRETT, S. C. H. . Pontederiaceae (Water Hyacinth family). In: Smith, S.A. Mori, A. Henderson, D. W. Stevenson, S.V. Heald. (Org.). Flowering Plants of the Neotropics. 1ed.Princeton: Princeton University Press, 2004, v. 1, p. 474-476.

• BARRETT, S.C.H. . A geographical context for the evolution of plant reproductive systems. In: J. Silvertown, J.Antonovics. (Org.). Integrating Ecological and Evolutionary Processes in a Spatial Context. 1ed.Oxford, U.K: Blackwell, 2001, v. 1, p. 341-363.

• BARRETT, S. C. H. . Microevolutionary influences of global change on plant invasions. In: H.A. Mooney, R.K. Hobbs. (Org.). The Impact of Global Change on Invasive Species. 1ed.Covelo, CA: Island Press, 2000, v. 1, p. 115-139.

• BARRETT, S. C.H ; BAKER, ANGELA M ; JESSON, LINLEY K. . Mating strategies in monocotyledons. In: K.L. Wilson, D. Morrison. (Org.). Systematics & Evolution of Monocots. 1ed.Australia: CSIRO Publishing, 2000, v. 1, p. 256-267.

• BARRETT, S.C.H. ; PANNELL, JOHN R. . Metapopulation dynamics and mating-system evolution in plants. In: P. Hollingsworth, R. Bateman & R. Gornall. (Org.). Molecular Systematics & Plant Evolution. 1ed.London, UK: Taylor & Francis, 1999, v. 1, p. 74-100.

• BARRETT, S. C.H ; COLE, WILLIAM W ; HARDER, LAWRENCE D. . Experimental studies on the effects of floral design and display on plant mating. In: S.J. Owen, P.J. Rudell. (Org.). Reproductive Biology in Systematics, Conservation & Economic Botany. 1ed.Kew: Royal Botanic Gardens, Kew, 1998, v. 1, p. 1-13.

• BARRETT, S.C.H. ; GRAHAM, SEAN W. . Adaptive radiation in the aquatic plant family Pontederiaceae: insights from phylogenetic analysis. In: T.J. Givnish, K. Sytsma. (Org.). Molecular Evolution and Adaptive Radiation. 1ed.Cambridge: Cambridge University Press, 1997, v. 1, p. 225-258.

• BARRETT, S. C. H. ; LLOYD, DAVID G ; ARROYO, JUAN . Stylar polymorphisms and the evolution of heterostyly. In: D.G. Lloyd, S.C.H. Barrett. (Org.). Floral Biology: Studies on Floral Evolution in Animal-Pollinated Plants. 1ed.New York, NY: Chapman & Hall, 1996, v. 1, p. 339-376.

• HARDER, LAWRENCE D. ; BARRETT, S. C.H. . Pollen dispersal and mating patterns in animal-pollinated plants. In: D.G. Lloyd, S.C.H. Barrett. (Org.). Floral Biology: Studies on Floral Evolution in Animal-Pollinated Plants. 1ed.New York, NY: Chapman & Hall, 1996, v. 1, p. 140-190.

• GRAHAM, SEAN W. ; BARRETT, S. C.H. . Phylogenetic systematics of the Pontederiales: Implications for breeding-system evolution. In: P.J. Ruddall, P. Cribb, D.F. Cutler, C.J. Humphries. (Org.). Monocotyledons: Systematics and Evolution.. 1ed.Kew: Royal Botanic Gardens, Kew, 1995, v. 1, p. 415-441.

• BARRETT, S. C.H. ; CRUZAN, MITCHELL B . Incompatibility in heterostylous plants. In: E.G. Williams, R.B. Knox, A.E. Clarke. (Org.). Genetic control of self-incompatibility and reproductive development in flowering plants. 1ed.Netherlands: Kluwer Academic Publ, 1994, v. 1, p. 189-219.

• BARRETT, S. C. H. . The evolutionary biology of tristyly. In: D. Futuyma, J. Antonovics. (Org.). Oxford Surveys in Evolutionary Biology. 1ed.Oxford, U.K: Oxford University Press, 1993, v. 9, p. 283-326.

• BARRETT, S. C. H. . Heterostylous genetic polymorphisms: model systems for evolutionary analysis. In: S.C.H. Barrett. (Org.). Function and Evolution of Heterostyly. 1ed.Berlim: Springer-Verlag, 1992, v. 1, p. 1-29.

• RICHARDS, JENNIFER H. ; BARRETT, S. C.H. . he development of heterostyly. In: S.C.H. Barrett. (Org.). Function and Evolution of Heterostyly. 1ed.Berlin: Springer-Verlag, 1992, v. 1, p. 85-127.

• BARRETT, S. C.H ; KOHN, JOSHUA R. ; CRUZAN, MITCHELL B . Experimental studies of mating-system evolution: the marriage of marker genes and floral biology. In: R. Wyatt. (Org.). Ecology and Evolution of Plant Reproduction: New Approaches. 1ed.London, UK: Springer, 1992, v. 1, p. 192-230.

• BARRETT, S. C.H. . Genetics of weed invasions. In: S.K. Jain, L. Botsford. (Org.). Applied Population Biology. 1ed.Netherlands: Wolfgang Junk, 1992, v. 1, p. 91-119.

• BARRETT, S. C.H ; BUSH, E. . Population level processes governing the response of plant populations to atmospheric pollution. In: G.E. Taylor Jr., L.F. Pitelka, M.T. Clegg. (Org.). Ecological Genetics and Air Pollution. 1ed.New York, NY: Springer-Verlag, 1991, v. 1, p. 137-165.

• BARRETT, S.C.H ; KOHN, JOSHUA R. . Genetic and evolutionary consequences of small population size in plants: implications for conservation. In: D. Falk, K. Holsinger. (Org.). Plant Conservation: Genetics and Biology. 1ed.Oxford, U.K: Oxford University Press, 1991, v. 1, p. 3-30.

• BARRETT, S. C.H ; ECKERT, CHRISTOPHER G . Variation and evolution of mating systems in seed plants. In: S. Kawano. (Org.). Biological Approaches and Evolutionary Trends in Plants. 1ed.Tokyo: Academic Press, 1990, v. 1, p. 229-254.

• BARRETT, S. C.H. ; HUSBAND, BRIAN C . Genetics of plant migration and colonization. In: A.H.D. Brown, M.T. Clegg, A.L. Kahler, B.S. Weir. (Org.). Plant Population Genetics, Breeding and Genetic Resources. 1ed.Massachusetts: Sinaeur Associates, 1990, v. 1, p. 254-277.

• BARRETT, S. C.H. ; RICHARDS, JENNIFER H. . Heterostyly in tropical plants. In: G. Prance, G. Gottsberger. (Org.). Reproductive Systems and Speciation in Tropical Woody Plants. 1ed.New York, NY: Memoirs of the New York Botanical Garden, 1990, v. 55, p. 35-61.

• BARRETT, S. C. H. . Mating system evolution and speciation in heterostylous plants. In: D. Otte, J. Endler. (Org.). Speciation and its Consequences. 1ed.Massachusetts: Sinauer Associate, 1989, v. 1, p. 257-283.

• BARRETT, S. C. H. . The evolutionary breakdown of heterostyly. In: Y. Linhart, J. Bock. (Org.). The Evolutionary Ecology of Plants. 1ed.Boulder, Colorado, US: Westview Press, 1989, v. 1, p. 106-126.

• Barrett, Spencer C. H. ; SHORE, JOEL S. . Isozyme Variation in Colonizing Plants. Isozymes in Plant Biology. 1ed.: Springer Netherlands, 1989, v. 1, p. 106-126.

• BARRETT, S. C. H. . Genetics and evolution of agricultural weeds. In: M. Altieri, M.Z. Liebman. (Org.). Weed Management in Agroecosystems: Ecological Approaches. 1ed.: CRC Press, 1988, v. 1, p. 57-75.

• BARRETT, S. C.H. . The evolution, maintenance and loss of self incompatibility systems. In: J. Lovett Doust, L. Lovett Doust. (Org.). Reproductive Strategies of Plants: Patterns and Strategies. 1ed.Oxford, U.K: Oxford University Press, 1988, v. 1, p. 98-124.

• BARRETT, S. C.H ; WOLFE, LORNE M. . Pollen heteromorphism as a tool in studies of the pollination process. In: D.L. Mulcahy. (Org.). Biotechnology and Ecology of Pollen. 1ed.: Springer-Verlag, 1986, v. 1, p. 435-442.

• BARRETT, S. C.H ; RICHARDSON, B. J. . Genetic attributes of invading species. In: R. Groves, J.J. Burdon. (Org.). Ecology of Biological Invasions: An Australian Perspective. 1ed.: Australian Academy of Sciences, Jaracaranda Publishing, 1986, v. 1, p. 21-33.

• BARRETT, S.C.H. . Ecological genetics of breakdown in tristyly. In: J. Haeck, J.W. Woldendorp. (Org.). Genotypic and Phenotypic Variation Within and Between Plant Populations. Conference Proceedings of the Second International Symposium on the Structure and Function of Plant Populations, Wageningen, Holland. 1ed.: North Holland Publishing Co., 1985, v. 1, p. 267-276.

• BARRETT, S. C. H. . A comparison of weed communities of rice in Australia and California. In: J.R. Dodson, M. Westoby. (Org.). Are Australian Ecosystems Different?. 1ed.: Proceedings of the Ecologica¬ Society of Australia, 1985, v. 14, p. 237-250.

• Brown, A.H.D. ; BARRETT, S. C. H. ; Moran, G. . Mating system estimation in forest trees: models, methods and meanings. In: H. Gregorius. (Org.). Population Genetics in Forestry (Lecture Notes in Biomathematics). 1ed.: Springer-Verlag, 1985, v. 1, p. 32-49.

• BARRETT, S. C. H. . Water Hyacinth. In: D. Janzen. (Org.). Costa Rican Natural History. 1ed.Chicago: University of Chicago Press, 1983, v. 1, p. 236-239.

• BARRETT, S. C. H. . Genetic variation in weeds. In: R.C. Charudattan, H. Lynn Walker. (Org.). Biological Control of Weeds with Plant Pathogens. 1ed.New York, NY: John Wiley, 1982, v. 1, p. 73-98.

• BARRETT, S. C. H. . The Pontederiaceae. In: V.H. Heywood. (Org.). Flowering Plants of the World. 1ed.Oxford, U.K: Oxford University Press, 1978, v. 1, p. 309-311.

• BARRETT, S. C. H. . The evolution of gender strategies and sex ratios in plants. 2013. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H. . The evolution of gender strategies and sex ratios in plants. 2013. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Tel Aviv University, Department of Plant Sciences. 2013. (Apresentação de Trabalho/Seminário).

• BARRETT, S. C.H . Hebrew University of Jerusalem, Department of Ecology, Evolution & Behavior, Jerusalem. 2013. (Apresentação de Trabalho/Seminário).

• BARRETT, S. C.H . loral adaptation & mating systems in Solanum: diversity within the uniformity of the Solanoid flower. 2012. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . The evolution of gender strategies and sex ratios in plants. 2012. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Exploring floral diversity: plants, people & places.. 2012. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolutionary transitions in plant reproductive systems: insights from molecular population genetics and genomics and Evolution of gender strategies and sex ratios in plants. 2012. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . exual diversity in plants and the evolution of sex ratios. 2012. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . exual diversity in plants and the evolution of sex ratios. 2012. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . What we know and don?t know about mirror-image flowers.. 2011. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolutionary transitions from outcrossing to selfing in plants: insights from molecular population genetics and genomics. 2011. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolutionary transitions in plant reproductive systems. 2011. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolutionary genetics of sexual-system transitions in flowering plants. 2010. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Floral biology of evolutionary transitions in plant sexual systems. 2010. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Charles Darwin and current perspectives on the evolution and function of plant sexual diversity (Keynote address).. 2009. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolutionary genetics and ecology of polymorphic sexual systems in flowering plants.. 2009. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Forms and function of flowers: Darwin?s legacy. 2009. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution and local adaptation in invasive species. 2009. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution and local adaptation in invasive species. 2009. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Darwin legacy: the forms, function and sexual diversity of flowers.. 2009. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Major evolutionary transitions in plant reproductive systems. 2009. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . A Darwinian perspective on the evolution and function of floral diversity. 2009. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Environmental influences on sex ratios in a dioecious plant. 2008. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Environmental influences on sex ratios in a dioecious plant. 2008. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Ecology and evolution of wind pollination. 2008. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . A Darwinian perspective on the evolution of plant sexual diversity. 2008. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Reproductive systems and evolution during plant invasion. 2008. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Progress and application of multilocus barcodes DNA barcodes in plants. 2008. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolutionary transitions in plant mating systems. 2008. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Morphology and mating in sexually polymorphic plant populations. 2007. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Teaching first-year biology: an evolutionary approach. 2007. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . A Lloydian perspective on the evolution and function of heterostylous sexual systems. 2007. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . The evolution of asymmetrical mating in wild daffodils (Narcissus). 2007. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . The evolution of adaptation during biological invasion. 2007. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Reproductive biology, genetics, and evolution of local adaptation. 2006. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Reproductive diversity, adaptation and biological invasion. 2006. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . he ecological and evolutionary consequences of functional interactions between clonal growth and mating. 2006. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution of polymorphic sexual systems in Narcissus. 2005. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution of combined versus separate sexes in flowering plants. 2004. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Two seminars on sexual polymorphisms. 2004. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . The evolution of dioecy: an amateur?s perspective. 2004. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Diddling with dioecy: an amateur?s perspective. 2004. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution of plant sexual diversity. 2004. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution of combined versus separate sexes in plants. 2004. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . The mysterious sex lives of daffodils. 2004. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution of mating strategies in flowering plants. 2002. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution of mating strategies in flowering plants. 2002. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution and adaptive significance of mirror-image flowers. 2002. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Sexual interference of the floral kind. 2001. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . A geographical perspective on the evolution of plant reproductive systems. 2000. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolutionary biology of plant sex.. 1999. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Ecology and evolution of heterostyly. 1999. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolution and functional significance of stylar polymorphisms in plants. 1999. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Effects of small population size on plant reproduction. 1999. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Genetic markers in plant ecology & evolution. 1999. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Ecology & evolution of plant mating.. 1999. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Microevolutionary influences of global environmental change on plant populations. 1999. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Mating stratgeies in monocotyledons. 1998. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . cology & evolution of plant mating. 1998. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Reproductive biology & genetics of Narcissus: Implications for conservation & breeding.. 1998. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Plant mating systems. 1998. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . nfluences of global change on the reproductive biology and genetics of plant invasions. 1998. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Genetic Drift. 1998. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evidence for genetic drift in plant populations. 1997. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Metapopulation dynamics and plant mating systems. 1997. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Two invited lectures at symposium. 1996. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Experimental studies on the effects of floral design and display on plant mating. 1996. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Ecology and genetics of ephemeral plant populations. 1996. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . The comparative biology of pollination and mating in flowering plants. 1996. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Current issues in plant speciation. 1995. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . The reproductive biology and genetics of island plants. 1995. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . The evolutionary ecology of plant mating. 1995. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Adaptive radiation in the aquatic plant family Pontederiaceae: insights from phylogenetic analysis. 1995. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Mating-system evolution in flowering plants: micro- and macroevolutionary approaches. 1995. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Participant at Workshop 'The emerging relevance of evolutionary biology to applied problems and opportunities'. 1994. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolutional ecology of plant mating. 1994. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Breeding system evolution in plants: macro- and micro-evolutionary approaches. 1994. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Proximate and ultimate factors influencing the evolution of self-fertilization. 1994. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Stochastic Processes and mating-system evolution. 1993. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Pollen dispersal and mating systems in animal pollinated plants. 1993. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Phylogenetic systematics of the Pontederiales: implications for breeding-system evolution. 1993. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Evolutionary processes in aquatic plant populations. 1991. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Experimental studies of mating-system evolution.. 1991. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Participant U.S.D.A. sponsored workshop on 'Safeguards for Planned Introduction of Transgenic Crops: Maize and Corn. 1990. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Plant conservation biology: a genetic and evolutionary perspective.. 1990. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Organizer of Symposium 'Evolution of Plant Mating Systems'. 1990. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Mating system variation in plants: causes and consequences. 1989. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Ecological genetics of plant reproductive systems. 1989. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Population level processes governing the response of plant populations to atmospheric pollution.. 1989. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Population bottlenecks & inbreeding depression in plant populations. 1989. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Invasions of exotic aquatic macrophytes. 1989. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . The future of research in ecology & evolution in Canada. 1988. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Genetics of plant migration and colonization. 1988. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Mating system evolution and speciation in heterostylous plants. 1987. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Genetics of weed invasions. 1987. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Participant N.S.F. sponsored workshop on 'An Assessment of the Likelihood for Weediness to Arise from the Release of Higher Plants altered Through Recombinant DNA Genetics'. 1987. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Breeding systems in Eichhornia and Pontederia, tristylous genera of the Pontederiaceae. 1987. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Gender monomorphism and dimorphism in Wurmbea dioica (Liliaceae). 1987. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Heterostyly in tropical plants. 1987. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Genetic perspectives on the diversity of form in vascular plants. 1987. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Ecology and genetics of weeds. 1986. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Dynamics of pollination in Pontederia cordata. 1985. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Genetic attributes of invading species. 1984. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Ecological genetics of tristyly. 1984. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Breeding systems and flowering phenology of boreal forest herbs. 1982. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Variation in floral sexuality of diclinous plants. 1982. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Functional analysis of plant breeding systems. 1981. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Crop mimicry in weeds. 1981. (Apresentação de Trabalho/Conferência ou palestra).

• BARRETT, S. C.H . Levels of genetic variation in weed species. 1980. (Apresentação de Trabalho/Conferência ou palestra).

Projetos de pesquisa

• 1985 - Atual

  Floral biology, pollination and mating, Descrição: Many plant species possess floral polymorphisms and understanding their evolution and functional significance has been of considerable interest to evolutionary biologists since Darwin?s pioneering studies on the topic summarized in ?Forms of Flowers? (1877). We have investigated a range of problems associated with floral polymorphisms including heterostyly (39, 92, 103), stigma-height dimorphism (187, 196, 215), enantiostyly or mirror image flowers (190, 200, 201), heteranthery (254, 270) and various sexual polymorphisms (168, 229, 247, 262, 269) using diverse approaches. These have included comparative and phylogenetic methods (136, 199, 214, 241), floral manipulations and marker genes (97, 104, 130), and experiments focusing on the interaction of flowers and their pollinators (114, 119, 254). My own recent reviews on the topic of plant sexual diversity (188, 262) identify many unanswered questions that would repay detailed investigation and students interested in projects on reproductive biology are always welcome in the lab. In collaboration with Bruce Anderson ( University of Stellenbosch, South Africa) we have recently investigated the origin and function of the specialized bird perch in Babiana, a genus of geophytes native to the Western Cape (220). Caroli de Waal recently completed her M.Sc. thesis in my lab on the reproductive ecology of four bird pollinated Babiana species, two of which possess specialized bird perches. She investigated the pollination biology, mating systems and patterns genetic diversity of these species and found that in B. ringens there was evidence for the loss of perch function associated with increased self-pollination in populations at the periphery of the eastern range of the species. Future work on the possibility of pollinator shifts involving different types of sunbirds visiting populations and the loss of bird pollination and evolution of selfing could be profitably undertaken. The evolution of wind pollination is poorly understood despite the fact that it represents one of the most important evolutionary transitions in pollination systems. A recently completed Ph.D. thesis in my laboratory by Jannice Friedman, now a PDF with John Willis at Duke University, involved the first comprehensive modern treatment of the ecology and evolution of wind pollination. Jannice addressed a range of questions concerning mating and pollination in anemophilous plants using diverse approaches including comparative methods, theoretical models, field experiments, marker gene studies of mating patterns, and glasshouse quantitative genetic analyses. Her work has helped to explain a number of long standing questions including why anemophilous species commonly have unisexual flowers with only a single ovule. This diversity of projects on plant reproduction that I have supervised reflect my own strong interest in this area and I would be happy to take on students who might be interested in pursuing any of these topics further.. , Situação: Em andamento; Natureza: Pesquisa. , Integrantes: Spencer Barrett - Coordenador / Bruce Anderson - Integrante / Caroli de Waal - Integrante / Jannice Friedman - Integrante.

• 1981 - Atual

  Gender strategies and the evolution of sex ratios, Descrição: I have a long-standing interest in gender strategies, and in trying to understand the costs and benefits of combined versus separate sexes. Earlier work involved studies of Aralia (16, 18) and Wurmbea (179, 227) but more recently we have concentrated our efforts on the clonal, aquatic plant genus Sagittaria, particularly S. latifolia. This species is common in eastern N. America and populations are mostly either monoecious or dioecious and occupy different wetland habitats. Although plants of the two sexual systems are fully inter-fertile, there is little gene flow between them over most of their range because of ecological and life-history differentiation. We have exploited the intra-specific variation in sexual systems of S. latifolia in an effort to understand the ecological and genetic mechanisms responsible for the evolution and maintenance of dioecy (177, 184, 198, 205, 216). Sarah Yakimowski has recently developed microsatellite markers for this species (257) and this has allowed us to investigate the breakdown of sexual system differentiation at range limits where populations are composed of females, males and hermaphrodites (267). I would be interested in supervising future student projects on Sagittaria and these could involve investigations of: 1) the genetic basis of life history differentiation in monoecious and dioecious populations using QTL-mapping, 2) the ecological mechanisms responsible for sexual system differentiation through reciprocal transplant experiments; 3) the role of clone size, geitonogamous selfing and inbreeding depression in the spread of unisexuals in monoecious populations. We have also been working on the problem of sex ratio bias in dioecious populations. David Field and Melinda Pickup, two PDF?s currently in the lab, are preparing a review paper concerning the ecological and life history correlates of biased sex ratios in dioecious species. In addition, we have been working on Rumex species, a group of wind-pollinated herbs characterized by female biased sex ratios. We are interested in determining the mechanisms responsible for this female bias, which is less common in flowering plants than male bias. Working with R. nivalis, former PDF Ivana Stehlik demonstrated that bias results from both microgametophyte selection and gender based differences in mortality (223, 226, 233, 249). This work was greatly facilitated by the development of sex?specific markers. We are now exploring sexual dimorphism and the mechanisms governing female bias in R. hastatulus, an annual species native to the southern USA ranging in distribution from Texas to North Carolina. Specifically, Melinda Pickup is investigating three main questions: 1) What is the extent of geographical variation in sexual dimorphism; 2) to what extent does the local mating environment influence the degree of female bias in progeny sex ratios; 3) what is the relative importance of plant density and local sex ratio variation on progeny sex ratios. I am interested in recruiting a Ph.D. student and a PDF to begin collaboration with my colleague Stephen Wright in EEB on sex chromosome evolution in R. hastatulus. This species is an excellent model system because it is annual, very easy to grow and cross, and we also have a broad sampling of geographical variation. The species is of particular interest because it possesses two distinct mechanisms of sex determination. In populations from the western portion of the range females are XX and males are XY, whereas in eastern populations females are XX and males are XYY. Phylogenetic evidence indicates that species in the genus with two Y-chromosomes are derived from those with a single Y. We are interested in investigating various aspects of the molecular population genetics and molecular evolution of X- and Y-chromosomes in this group.. , Situação: Em andamento; Natureza: Pesquisa. , Integrantes: Spencer Barrett - Coordenador / David Field - Integrante / Melinda Pickup - Integrante / Ivana Stehlik - Integrante / Stephen Wright - Integrante / Josh Hough - Integrante.

• 1978 - Atual

  Evolutionary transitions from outcrossing to selfing, Descrição: The transition from outcrossing to selfing is very common in flowering plants and has important demographic, genetic and evolutionary consequences. We have worked on this problem using two main systems (Turnera, Eichhornia); both involve the evolutionary breakdown of heterostyly. Most of our focus in recent years has been on the neotropical, annual, aquatic Eichhornia paniculata, where we have evidence of multiple independent transitions to selfing (115, 259). This species is an excellent study system as it is diploid, easily crossed and we can grow 2-3 generations a year in our glasshouses at Toronto. We have extensive collections of E. paniculata from throughout its range ( Brazil, Jamaica, Cuba, Central America). Work by Brian Husband, Martin Morgan and Josh Kohn in the 90s demonstrated that the shift to selfing in E. paniculata results from the joint action of genetic drift and natural selection and represents one of the few cases that meet several of the key conditions in Sewall?s Wright?s shifting balance theory of evolution.. , Situação: Em andamento; Natureza: Pesquisa. , Integrantes: Spencer Barrett - Coordenador / Robert Ness - Integrante / Mathieu Siol - Integrante.

• 1977 - Atual

  Evolutionary genetics and local adaptation in invasive species, Descrição: Ever since I worked as a weed biologist in Swaziland and the Lower Amazon Basin, I have been fascinated by the ecology and evolution of invasive plants. Where do they come from and why are they invasive? My early studies concerned two quite different problems: 1) crop mimicry in barnyard grasses (24); 2) the relative importance of clonal vs. sexual reproduction in water hyacinth (10, 11). More recently, in collaboration with my former Ph.D. students Chris Eckert (Queens University) and Rob Colautti (now a PDF with Tom Mitchell-Olds at Duke) we have been investigating the evolution of local adaptation in the wetland invader Lythrum salicaria. By sampling seed collected from representative populations across the invasive eastern North American range and using common garden and quantitative genetic analyses we have demonstrated: 1) abundant heritable variation for most life history traits; 2) reduced variance and increased skew of quantitative traits with northward migration; 3) strong clines in flowering time and plant size associated with latitude and length of growing season; and 4) evidence for genetic constraints at range limits between flowering time and size (265). Further, reciprocal transplant experiments and measurements of natural selection have provided evidence indicating a fitness advantage to plants that flower earlier at a smaller size in northern populations (271). There are still many fascinating questions concerning the invasion genetics of purple loosestrife and I would be interested in collaborating with a student on this system. In addition, I have recently completed a collaborative study with colleagues in China from Beijing Normal University on a world wide survey of genetic diversity in water hyacinth (268). This study highlights the need for more intensive surveys of populations in the native range and for studies of genotype by environment interactions to investigate the ecological tolerances of clones from different regions.. , Situação: Em andamento; Natureza: Pesquisa. , Integrantes: Spencer Barrett - Coordenador / Christopher Eckert - Integrante / Rob Colautti - Integrante.

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