Robert K. Jansen (born 1954), U.S. botanist.

IPNI standard form: R.K.Jansen

Taxon names authored

(List may be incomplete)

• 14 taxon names authored by Robert K. Jansen

Publications

(List may be incomplete)

• Jansen, R. & Parfitt, B. 1977. Allenrolfea mexicana Lundell (Chenopodiaceae): Its conspecificity with A. occidentalis (S.Wats.) Kuntze. Rhodora 79(817): 130–132. BHL Reference page. 
• Jansen, R.K. 1985. The systematics of Acmella (Asteraceae-Heliantheae). Systematic Botany Monographs 8: [2] + 115 pp. Reference page. 
• Bremer, K. & Jansen, R.K. 1992. A New Subfamily of the Asteraceae. Annals of the Missouri Botanical Garden 79(2): 414–415. JSTOR BHL Reference page. 
• Spooner, D.M., Anderson, G.J. & Jansen, R.K. 1993. Chloroplast DNA Evidence for the Interrelationships of Tomatoes, Potatoes, and Pepinos (Solanaceae). American Journal of Botany 80(6): 676–688. DOI: 10.1002/j.1537-2197.1993.tb15238.x. JSTOR. Reference page. 
• Loockerman D.J., Turner, B.L. & Jansen, R.K. 2003. Phylogenetic Relationships within the Tageteae (Asteraceae) Based on Nuclear Ribosomal ITS and Chloroplast ndhF Gene Sequences. Systematic Botany 28(1): 191–207. DOI: 10.1043/0363-6445-28.1.191 Reference page. 
• Gruenstaeudl, M., Urtubey, E., Jansen, R.K., Samuel, M.R., Barfuss, M.H.J. & Stuessy T.F. 2009. Phylogeny of Barnadesioideae (Asteraceae) inferred from DNA sequence data and morphology. Molecular Phylogenetics and Evolution 51(3): 572–587. DOI: 10.1016/j.ympev.2009.01.023 ResearchGate Reference page.