Four New Species of Paspalum (Poaceae, Paniceae) from Central Brazil, and Resurrection of an Old One

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Abstract:

Four new Brazilian species from the genus are described and illustrated: , and . is an annual with no obvious affinity to any known species of , although it shares several characters with species of both subg. and the 'Bertoniana' group. is presumably related to , with which it has been confused. shows affinities with both and . is probably related to annual species of the 'Plicatula' group, although it lacks the dark brown upper florets typical of that group. Moreover, , a species currently considered as a synonym under , is recognized on the basis of vegetative morphology, phenology and habitat. Keys to the treated species are provided when relevant, as well as a distribution map.

Portuguese
Quatro novas espécies de Paspalum do Brasil são descritas e ilustradas: P. phaeotrichum, P. vexillarium, P. veredense , e P. clipeum . Paspalum phaeotrichum é uma espécie anual sem afinidades obvias com outras espécies do gênero, embora compartilhe vários caracteres com P. subg. Ceresia e com o grupo 'Bertoniana'. Paspalum vexillarium é supostamente relacionada a P. ceresia, com a qual tem sido confundida. Paspalum veredense tem afinidades com P. ellipticum e P. erianthoides. Paspalum clipeum é provavelmente relacionada às espécies anuais do grupo 'Plicatula', embora não apresente os antécios superiores de cor marrom escura, típicos desse grupo. Além disso, P. spissum, uma espécie atualmente considerada como sinônimo de P. carinatum, é reabilitada com base na morfologia vegetativa, fenologia e habitat. São fornecidas chaves para as espécies tratadas, quando relevante, assim como um mapa de distribuição.

Keywords: BRAZILIAN FLORA; CERRADO; GRASSES; PANICOIDEAE; TAXONOMY

Document Type: Research Article

DOI: http://dx.doi.org/10.1600/036364408784571671

Publication date: April 1, 2008

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