A Taxonomic Revision of Desmodium (Leguminosae, Papilionoideae) in Brazil

Abstract

Desmodium is characterized mainly by lilac flowers arranged in pseudoracemose inflorescences, stamens monadelphous or diadelphous and a lomentaceous fruit generally covered by uncinate hairs. A taxonomic revision of the Brazilian species was carried out based on the analysis of 3,000 herbarium specimens, including all nomeclatural types. Field trips to the most species-rich areas of Desmodium in Brazil were undertaken, resulting in the sampling of 29 out of the 34 species recognised for the country. We recognise 101 names as synonyms, 27 of which are new. Lectotypes were designated for 60 accepted names and synonyms, and two neotypes and one epitype were chosen. A new combination is proposed for Meibomia microcarpa, as well as a new name for Meibomia guaranitica var. microcarpa. Desmodium album is a new record for Brazil, and D. craspediferum, D. glabrescens and D. juruenense, previously known only by type collections, were recollected during this study. All species are described, mapped and illustrated. An identification key, and comments on taxonomy and nomenclature are provided.

Diversity and conservation of legumes in the Gran Chaco and biogeograpical inferences

“…Gmel., and Rhynchosia Lour. [80, 95, 96, 97, 98, 99, 100]. Regarding this subfamily, it is very interesting to note that most of its species (half of them) have a generalist lineage, which would involve low morphological specialization in the Gran Chaco ecoregion, therefore coinciding with the low percentage of endemic taxa mentioned above.…”

Flora das cangas da serra dos Carajás, Pará, Brasil: Leguminosae

“…Desmodium (subfamília Papilionoideae, tribo Desmodieae) caracteriza-se, principalmente, pelo hábito subarbustivo ou arbustivo, folhas geralmente trifolioladas, flores de corola rósea a roxa, inflorescência pseudorracemosa ou paniculada e fruto lomento, frequentemente com tricomas uncinados (Queiroz 2009;Lima et al 2014). Compreende ca.…”

“…Espécie com distribuição pantropical (Lima et al 2014). No Brasil ocorre em todos os estados (BFG 2015).…”

Desmodium raymundoramirezii (Desmodieae: Leguminosae), una especie nueva de la sierra Madre del Sur, México

“…es el género más diverso y complejo de la tribu Desmodieae (Benth.) Hutch., con alrededor de 275 especies distribuidas en los trópicos y subtrópicos del mundo y con centros de diversidad en el SE de Asia y en el continente americano en México y Brasil (Lima, Queiroz, Tozzi y Lewis 2014;Ohashi, 1973Ohashi, , 2005. Cien de sus especies se localizan en México, de las cuales casi el 50% son endémicas de bosques templados (Sousa y Delgado, 1993), aunque algunas extienden su distribución a regiones tropicales y semiáridas del país.…”