19 research outputs found
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
Heteranthera Ruiz & Pavon 1794
Key to Heteranthera in the Mexican Yucatan Peninsula 1. Leaf-blade clearly differentiated from petiole, variously ovate, elliptical to orbicular; the pseudo-petiole longer than the blade; flowers always purple or purple-violet............................................................................................................... Heteranthera limosa - Leaf-blade not differentiated from petiole, linear; flowers purple-violet, lilac or yellow..................................................................2 2. Inflorescence sessile, axillary, with a solitary flower; flowers yellow, actinomorphic; all three anthers of the same size and shape.............................................................................................................................................................................. Heteranthera dubia - Inflorescence pedunculate, terminal, generally with several flowers, rarely only a single one; flowers lilac, zygomorphic; anthers of different sizes and shapes........................................................................................................................... Heteranthera yucatanaPublished as part of Carnevali, Germán, Stefano, Rodrigo Duno De, Ramírez-Morillo, Ivón M., Grande Allende, José R., Barrios, Yeni & Tapia-Muñoz, José Luis, 2022, Heteranthera yucatana (Pontederiaceae), a new, threatened species from the Mexican Yucatan Peninsula, pp. 20-30 in Phytotaxa 547 (1) on page 27, DOI: 10.11646/phytotaxa.547.1.2, http://zenodo.org/record/655575
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