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.
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.
Ryburn, A.K., et al. 2018. Flora of Oklahoma, Keys and Descriptions, 2nd edition. Flora Oklahoma Incorporated. Oklahoma City, OK.
Drew, B.T., et al. 2017. Salvia united: The greatest good for the greatest number. Taxon 66 (1): 133–145.
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.
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.
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.
Soltis, et al. 2011. Angiosperm phylogeny: 17 genes, 640 taxa. American Journal of Botany 98:704-730.
Walker, J.B. 2011-2020. Teacher training workshop, SENSEsational Science. Tulsa Zoo.
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.
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.
Walker, J.B. 2007. Systematics of the genus Salvia: Parsimony, Sage, Rosemary, and Time. University of Oklahoma department of Botany/Microbiology Seminar. Norman, OK.
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.
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.
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.
Walker, J.B. 2006. Systematics of the genus Salvia. Ph.D. dissertation. University of Wisconsin, Madison.
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.
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.
Sytsma, K.J. and J.B. Walker. 2005. The ‘giant genus’ problem: issues, solutions, opportunities? Presentation. XVII International Botanical Congress. Vienna, Austria.
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.
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.
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.
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.