Publications/Presentations
Walker, J.B. 2019. Phryma. in Flora of North America North of Mexico, Volume 17: Magnoliophyta: Tetrachondraceae to Orbobanchaceae. Oxford University Press USA.
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Kriebel, R., et al. 2019. Tracking temporal shifts in area, biomes, and pollinators in the radiation of Salvia (sages) across continents: leveraging anchored hybrid enrichment and targeted sequence data. American Journal of Botany. 106 (4): 573–597.
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Ryburn, A.K., et al. 2018. Flora of Oklahoma, Keys and Descriptions, 2nd edition. Flora Oklahoma Incorporated. Oklahoma City, OK.
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Drew, B.T., et al. 2017. Salvia united: The greatest good for the greatest number. Taxon 66 (1): 133–145.
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Walker, J.B., B.T. Drew and K.J. Sytsma. 2015. Unravelling Species Relationships and Diversification within the Iconic California Floristic Province Sages (Salvia subgenus Audibertia, Lamiaceae). Systematic Botany. 40(3): pp. 826–844
Walker, J.B. 2012. Oklahoma Natives - Plants and People. Oklahoma Native Plant Society indoor outing. Tulsa, OK.
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Jenks, A, J.B. Walker and Seung-Chul Kim. 2012. Phylogeny of New World Salvia subgenus Calosphace (Lamiaceae) based on cpDNA (psbA-trnH) and nrDNA (ITS) sequence data. Journal of Plant Research. 126: 483–496.
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Jenks, A, J.B. Walker and Seung-Chul Kim. 2011. Evolution and origins of the Mazatec hallucinogenic sage, Salvia divinorum (Lamiaceae): a molecular phylogenetic approach. Journal of Plant Research 124 (5): 593-600.
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Soltis, et al. 2011. Angiosperm phylogeny: 17 genes, 640 taxa. American Journal of Botany 98:704-730.
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Walker, J.B. 2011-2020. Teacher training workshop, SENSEsational Science. Tulsa Zoo.
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Moon, H-K., S. Vinckier, J.B. Walker, E. Smets, and Suzy Huysmans. 2008. A search for phylogenetically informative pollen characters in the subtribe Salviinae (Mentheae: Lamiaceae). International Journal of Plant Sciences 169(3):455-471.
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Walker, J.B. 2007. Phylogenetic relationships within the genus Salvia, staminal evolution, and relations within subgen. Audibertia. Rancho Santa Ana Botanical Garden seminar series. Claremont, CA.
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Walker, J.B. 2007. Systematics of the genus Salvia: Parsimony, Sage, Rosemary, and Time. University of Oklahoma department of Botany/Microbiology Seminar. Norman, OK.
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Walker, J.B. 2007. Happy trails to you: Current and future hiking trails at the new Oklahoma Centennial Botanical Garden. OCBG Centennial Event. Tulsa, OK.
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Sytsma, K.J., L. Katinas, J. Crisci, R. Jabaily, C. Williams, J.B. Walker, B. Drew, and J. Bonifacino. 2007. Evolution of secondary heads in Nassauviinae (Asteraceae, Mutisieae). American Journal of Botany 95: 229-240.
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Walker, J.B., and K.J. Sytsma. 2007. Staminal evolution in the genus Salvia (Lamiaceae): molecular phylogenetic evidence for multiple origins of the staminal lever. Annals of Botany 100:375-391.
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Walker, J.B. 2006. Systematics of the genus Salvia. Ph.D. dissertation. University of Wisconsin, Madison.
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Campbell, D.G., A. Ford, K. Lowell, J. B. Walker, J. Lake, C. Ocampo-Raeder., A. Townesmith & M. Balick. 2006. The Feral Forests of the Eastern Peten. In Erickson & Balee (eds.) Time and Complexity in the Neotropical Lowlands. Columbia University Press. New York.
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Walker, J.B. and K.J. Sytsma. 2005. Evolution in the genus Salvia; species radiations, floral innovations, and biogeography. Presentation. XVII International Botanical Congress. Vienna, Austria.
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Sytsma, K.J. and J.B. Walker. 2005. The ‘giant genus’ problem: issues, solutions, opportunities? Presentation. XVII International Botanical Congress. Vienna, Austria.
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Sytsma, K.J., A. Litt, M. L. Zjhra, J.C. Pires, M. Nepokroeff, E. Conti, J. B. Walker, & P.G. Wilson. 2004. Clades, Clocks, and Continents: Historical and Biogeographical Analysis of Myrtaceae, Vochysiaceae, and Relatives in the Southern Hemisphere. Int. J. Plant. Sci. 165(4 Suppl.):S85-S105.
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Lake, J.K., V.A. Castillo, V.C. Ocampo-Raeder, S.C. Smith, J.B. Walker, and D.G. Campbell. 2004. The Oligarchy of Tropical Forests in Belize. Presented at Pew Undergraduate Research Symposium, University of Chicago, November, 2004.
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Walker, J.B., K.J. Sytsma, J. Treutlein, and M. Wink. 2004. Salvia (Lamiaceae) is not monophyletic: Implications for the systematics, radiation, and ecological specializations of Salvia and tribe Mentheae. American Journal of Botany 91(7): 1115-1125.
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Walker, J.B., K.J. Sytsma, and M. Wink. 2002. Salvia (Lamiaceae) is not monophyletic: Implications for the systematics, radiation, and ecological specializations of Salvia and subf. Nepetoideae. American Journal of Botany, Supplementary Abstracts.