Systematics Section / ASPT
Duffy, Aaron M. , Funke, Mindie M. , Clark, John L. , Smith, James F. .
A phylogenetic analysis of the genera of tribe Episcieae (Gesneriaceae) from multiple loci.
Episcieae have long been considered monophyletic on the basis of unique nodal anatomy and chromosome numbers among the neotropical Gesneriaceae (Gesnerioideae). However the placement of several genera has either been questionable, or the genera have been placed in other tribes. These are primarily the Guianan endemics, Rhoogeton, Cremersia, Lampadaria, and Lembocarpus. Recently collected material of three of these genera place them in Episcieae, but as sister to the remainder of the tribe. The large genera Paradrymonia and Nautilocalyx, thought to be closely related may not comprise a monophyletic group independently of each other and Chrysothemis. The fleshy-fruited genera of the Columnea alliance are well-supported although generic delimitations are not as clear as previously classifications. Nematanthus and Codonanthe, both genera with n = 8 chromosomes, are sister to each other and Codonanthopsis is sister to this clade. Lastly, the remaining genera, each with a smaller number of species, form two monophyletic groups, one sister to the Columnea clade, the other sister to the n = 8 clade. Fleshy fruits and reversals to terrestrial from an epiphytic habit appear to have occurred multiple times in this group.
1 - George Washington University, Biological Sciences, 2023 G St.NW, Washington, DC, 20052, USA
2 - Boise State University, Biology, 1910 University Drive, Boise, Idaho, 83725, USA
Presentation Type: Paper
Location: Cottonwood A (Snowbird Center)
Date: Tuesday, August 3rd, 2004
Time: 9:45 AM