Merrill, Richard M., Henry Arenas-Castro, Anna F. Feller, Julia Harenčár, Matteo Rossi, Matthew A. Streisfeld, and Kathleen M. Kay. “Genetics and the Evolution of Prezygotic Isolation.” Cold Spring Harbor Perspectives in Biology, October 17, 2023, a041439. pdf Spanish version
Delmore, Kira, Hannah Justen, Kathleen M. Kay, Jun Kitano, Leonie C. Moyle, Rike Stelkens, Matthew A. Streisfeld, Yo Y. Yamasaki, and Joseph Ross. “Genomic Approaches Are Improving Taxonomic Representation in Genetic Studies of Speciation.” Cold Spring Harbor Perspectives in Biology, October 17, 2023, a041438. pdf
Diaz-Martin, Zoe, Anita Cisternas-Fuentes, Kathleen M. Kay, Robert A. Raguso, Krissa Skogen, and Jeremie Fant. “Reproductive Strategies and Their Consequences for Divergence, Gene Flow, and Genetic Diversity in Three Taxa of Clarkia.” Heredity 131, no. 5 (December 2023): 338–49.
Maguiña-Conde, Rossana, Dorali Zuñiga-Rivas, and Kathleen M. Kay. “An Elevational Gradient in Floral Traits and Pollinator Assemblages in the Neotropical Species Costus Guanaiensis Var. Tarmicus in Peru.” Ecology and Evolution 13, no. 8 (2023): e10314.
Harenčár, J., O. M. Vargas, M. Escalona, D. W. Schemske, and K. M. Kay. 2023. Genome assemblies and comparison of two Neotropical spiral gingers: Costus pulverulentus and C. lasius. Journal of Heredity 114:286–293.
Juárez, P., O. M. Vargas, and K. M. Kay. 2023. Ecological and Evolutionary Origin of Costus flammulus (Costaceae): A New Species from the Montane Cloud Forests of the Volcanic Cordilleras in Northern Costa Rica. Systematic Botany 48:145–157 (pdf).
Kay, K. M., and D. L. Grossenbacher. 2022. Evolutionary convergence on hummingbird pollination in Neotropical Costus provides insight into the causes of pollinator shifts. New Phytologist 236:1572-1583.
Harenčár, J. G., E. Ávila-Lovera, G. R. Goldsmith, G. F. Chen, and K. M. Kay. 2022. Flexible drought deciduousness in a neotropical understory herb. American Journal of Botany 109:1262–1272.
Sianta, S. A., and K. M. Kay. 2022. Phylogenomic analysis does not support a classic but controversial hypothesis of progenitor-derivative origins for the serpentine endemic Clarkia franciscana. Evolution 76:1246–1259.

Ávila-Lovera E, Goldsmith GR, Kay KM, Funk JL. 2022. Above and belowground functional trait coordination in the Neotropical understory genus Costus. AoB PLANTS: plab073.

Kay, KM and Y Surget-Groba. 2021. The genetic basis of floral mechanical isolation between two hummingbird-pollinated Neotropical understory herbs. Molecular Ecology, online early.

Goff, K. A., C. Martinez del Rio, and K. M. Kay. 2021. A greenhouse experiment partially supports inferences of ecogeographic isolation from niche models of Clarkia sister species. American Journal of Botany 108: 2002–2014.

Sianta SA, Kay KM. 2021. Parallel evolution of phenological isolation across the speciation continuum in serpentine-adapted annual wildflowers. Proceedings of the Royal Society B: Biological Sciences 288: 20203076. 10.1098/rspb.2020.3076

Kay KM, Jogesh T, Tataru D, Akiba S. 2020. Darwin’s vexing contrivance: a new hypothesis for why some flowers have two kinds of anther. Proceedings of the Royal Society B: Biological Sciences 287: 20202593. 10.1098/rspb.2020.2593

Vargas, Oscar M., Brittany Goldston, Dena L. Grossenbacher, and Kathleen M. Kay. 2020. Patterns of speciation are similar across mountainous and lowland regions for a Neotropical plant radiation (Costaceae: Costus). Evolution 74: 2644–2661. (pdf)

Peterson, ML, Angert, AL, and Kay, KM. 2020. Experimental migration upward in elevation is associated with strong selection on life history traits. Ecology and Evolution (open access)

Lowry DB, Sobel JM, Angert AL, Ashman T-L, Baker RL, Blackman BK, Brandvain Y, Byers KJRP, Cooley AM, Coughlan JM, Dudash MR, Fenster CB, Ferris KG, Fishman L, Friedman J, Grossenbacher DL, Holeski LM, Ivey CT, Kay KM, Koelling VA, Kooyers NJ, Murren CJ, Muir CD, Nelson TC, Peterson ML, Puzey JR, Rotter MC, Seeman JR, Sexton JP, Sheth SN, Streisfeld MA, Sweigart AL, Twyford AD, Vallejo-Marin M, Willis JH, Wu CA, Yuan YW. 2019. The case for the continued use of the genus name Mimulus for all monkeyflowers. Taxon 68:617-623.

Sianta, SA and Kay, KM. 2019. Adaptation and divergence in edaphic specialists and generalists: serpentine soil endemics in the California flora occur in barer serpentine habitats with lower soil calcium levels than serpentine tolerators. American Journal of Botany 106: 690-703. (pdf)

Kay, KM, Zepeda, AM, and Raguso, RA. 2018. Experimental sympatry reveals geographic variation in floral isolation by hawkmoths. Annals of Botany 123: 405-413  (pdf)

Kay, KM, Woolhouse, S, Smith, BA, Pope, NS, and Rajakaruna, N. 2018. Sympatric serpentine endemic Monardella (Lamiaceae) species maintain habitat differences despite hybridization. Molecular Ecology 27: 2302-2316. (pdf)

Smith B, Kay KM. 2018. Differing Patterns of Genetic Diversity and Inbreeding in Two Rare Serpentine Monardellas in the Northern Sierra Nevada. Madroño 65: 10-21. doi: 10.3120/0024-9637-65.1.10 (pdf)

Peterson, M.L., Kay, K.M. and Angert, AL. 2016. The scale of local adaptation in Mimulus guttatus: comparing life history races, ecotypes, and populations. New Phytologist 211 (1), 345-356. doi: 10.1111/nph.13971 (pdf)

Briscoe Runquist R, Grossenbacher D, Porter S, Kay K, Smith J. 2016. Pollinator-mediated assemblage processes in California wildflowers. Journal of Evolutionary Biology 29(5):1045-58. doi: 10.1111/jeb.12845 (pdf).

Peterson, M.L., Miller, T.J., and Kay, K.M. 2015. An ultraviolet floral polymorphism associated with life history drives pollinator discrimination in Mimulus guttatus. American Journal of Botany 102:396-406, doi:10.3732/ajb.1400415 (pdf).

Peterson, M.L. and Kay, K.M. 2015. Mating system plasticity promotes persistence and adaptation of colonizing populations of hermaphroditic angiosperms. The American Naturalist 185: 28-43. doi: 10.1086/679107 (pdf).

Miller, T.J., Raguso, R.A., and Kay, K.M. 2014. Novel adaptation to hawkmoth pollinators in Clarkia reduces efficiency, not attraction of diurnal visitors. Annals of Botany, 113: 317-329 doi: 10.1093/aob/mct237 (pdf).

Frick, W.F., Shipley, J.R., Kelly, J.F., Heady, P.A., and Kay, K.M. 2014. Seasonal reliance on nectar by an insectivorous bat revealed by stable isotopes. Oecologia, 174:55–65 doi: 10.1007/s00442-013-2771-z (pdf).

Yost J.M., Bontrager, M., Burton, D., McCabe, S., Simpson, M., Kay, K.M., and M. Ritter. 2013. Phylogenetic relationships and evolution in Dudleya (Crassulaceae). Systematic Botany 38:1096-1104 doi: 10.1600/036364413X674760 (pdf).

Surget-Groba, Y. and Kay, K.M. 2013. Restricted gene flow within and between rapidly diverging Neotropical plant species. Molecular Ecology, 22: 4931–4942 doi: 10.1111/mec.12442 (pdf).

Lancaster, L.T. and Kay, K.M. 2013. Origin and diversification of the California flora: reexamining classic hypotheses with molecular phylogenies. Evolution 67:1041-1054 (pdf).

Frick, W.F., Price, R.D., Heady III, P.A., and Kay, K.M. 2013. Insectivorous bat pollinates columnar cactus more effectively per visit than specialized nectar bat. The American Naturalist 181:137-144. DOI: 10.1086/668595 (pdf) (video 1) (video 2)

Kay, K.M. and Picklum, D.A. 2013. Drought alters the expression of mating system traits in two species of Clarkia. Evolutionary Ecology 27:899-910 doi:10.1007/s10682-013-9630-6 (pdf).

Yost, J.M., Barry, T., Kay, K.M. and Rajakaruna, N. 2012. Edaphic adaptation maintains the coexistence of two cryptic species on serpentine soils. American Journal of Botany 99:890-897. doi:10.3732/ajb.1100521 (pdf)

Kay, K.M., Apkenas, V.E., and J.M. Yost. 2012. Permanent Genetic Resources: Expressed sequence tag library development and characterization of polymorphic microsatellite markers for the Neotropical spiral gingers, Costus (Costaceae). Molecular Ecology Resources 2:374-376. doi: 10.1111/j.1755-0998.2011.03109.x (pdf)

Louthan, A. and Kay, K. M. 2011. Comparing the adaptive landscape across trait types: larger QTL effect size in traits under biotic selection. BMC Evolutionary Biology 2011, 11:60. doi:10.1186/1471-2148-11-60 (pdf)

Kay, K. M., K. L. Ward, L. R. Watt, and D. W. Schemske. 2011. Plant Speciation. In S. P. Harrison and N. Rajakaruna, eds. Serpentine: The Evolution and Ecology of a Model System. Univ. of California Press, Berkeley, CA. (pdf)

Kay, K.M. and Sargent, R.D. 2009. The role of animal pollination in plant speciation: integrating ecology, geography, and genetics. Annual Review of Ecology, Evolution, and Systematics. 40: 637-656. DOI 10.1146/annurev.ecolsys.110308.120310.(pdf)(supplement pdf)

Yost, J.M. and Kay, K.M. 2009. The evolution of postpollination reproductive isolation in Costus. Sexual Plant Reproduction 22:247-255. DOI 10.1007/s00497-009-0113-4.(pdf)

Kay, K. M. and D. W. Schemske2008. Natural selection reinforces speciation in a radiation of Neotropical rainforest plants. Evolution 62: 2628-2642. (pdf)

Kay, K. M. 2006. Reproductive isolation between two closely related hummingbird-pollinated Neotropical gingers. Evolution 60: 538-552. (pdf

Kay, K. M., J. Whittall, and S. A. Hodges. 2006. A survey of nuclear ribosomal internal transcribed spacer substitution rates across angiosperms: an approximate molecular clock with life history effects. BMC Evolutionary Biology 6: 36. (pdf)

Kay, K. M., Voelckel, C., Yang, J. Y., Hufford, K. M., Kaska, D. D., and S. A. Hodges. 2006. Floral characters and species diversification. Chapter 17 In: Ecology and Evolution of Flowers (Eds. L. Harder and S. Barrett) Oxford University Press. (pdf)

Kay, K. M., Reeves, P., Olmstead, R., and D. W. Schemske. 2005. Rapid speciation and the evolution of hummingbird pollination in neotropical Costus subgenus Costus (Costaceae): evidence from nrDNA ITS and ETS sequences. American Journal of Botany 92: 1899 - 1910(pdf)

Kay, K. M. and D. W. Schemske. 2004. Geographic patterns in plant-pollinator mutualistic networks: Comment.  Ecology 85: 875 - 878.(pdf)

Kay, K. M. and D. W. Schemske. 2003. Pollinator assemblages and visitation rates for eleven species of Neotropical Costus (Costaceae). Biotropica 35: 198-207. (pdf)