DNA Sequence Variation among Conspecific Accessions of the Legume Coursetia caribaea Reveals Geographically Localized Clades Here Ranked as Species

 This is the author accepted manuscript. The final version is available from ASPT via the DOI in this recordCoursetia caribaea is geographically and morphologically the most variable species in the genus Coursetia and in the tribe Robinieae (Leguminosae, Papilionoideae). Because of potentially undetected species, we assessed the phylogenetic relationships among the eight taxonomic varieties of C. caribaea. Sampling included nuclear ribosomal internal transcribed spacer sequences from 489 Robinieae accessions representing all varieties of C. caribaea and 38 of the 40 species of Coursetia, in addition to chloroplast trnD-trnT sequences from 186 accessions. Separate and combined phylogenetic analyses resolved a clade of conspecific accessions of the Bolivian C. caribaea var. astragalina as sister to the central Andean Coursetia grandiflora clade. Also distantly related to Coursetia caribaea var. caribaea accessions were those of the coastal Oaxacan C. caribaea var. pacifica, which formed the sister clade to accessions of the central Andean C. caribaea var. ochroleuca. The estimated mean ages of the stem clades for these three lineages, 11, 7.7, and 7.7 Ma, respectively, contrasted to the estimated mean ages of the corresponding crown clades of 0, 0, and 1.5 Ma. The contrasting stem and crown ages suggest that these taxa, appropriately ranked as species, Coursetia astragalina , Coursetia diversifolia , and Coursetia ochroleuca , each have persisted over evolutionary time frames as distinct geographically localized populations in seasonally dry tropical forests and woodlands.USDA National Institute of Food and Agricultur

Typification and authorship of Drosera intermedia (Droseraceae)

Drosera intermedia is lectotypified with the herbarium specimen on which the type drawing in the 1798 protologue was based. The collection history of the specimen, the history of the botanical drawing as original material, and the correct nomenclatural author and publication date of the name are presented based on historical notes and literature. Additionally, the global distribution of the species is given, including the first record from Africa

Dos especies nuevas del g\ue9nero Drosera (Droseraceae) in Venezuela y otros comentarios taxon\uf3micos

Volume: 5Start Page: 241End Page: 24

A new species of Brachynema (Olacaceae) from South America

Volume: 5Start Page: 238End Page: 24

Byrsonima crassifolia

Angiosperm

Supplemental Map

Maps originally published as Fig. 110 and Fig. 111 in vol. 21 Systematic Botany Monographs. The Editor has granted permission to make the figures available here. For any subsequent use, please cite the original publication: Lavin M (1988) Systematics of Coursetia (Leguminosae-Papilionoideae). Systematic Botany Monographs, 21. Full text of vol 21 is available from American Society of Plant Taxonomists through JSTOR at https://doi.org/10.2307/2502770

Supplemental Figure 1.

A Bayesian consensus tree derived from the analysis of 489 nrDNA ITS/5.8S sequences