Four New Species of Paspalum (Poaceae, Paniceae) from Central Brazil, and Resurrection of an Old One
Four new Brazilian species from the genus Paspalum are described and illustrated:P. phaeotrichum, P. vexillarium, P. veredense, and P. clipeumPaspalum phaeotrichum is an annual with no obvious affinity to any known species of Paspalum, although it shares several characters with species of both P. su...
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Veröffentlicht in: | Systematic botany 2008-04, Vol.33 (2), p.267-276 |
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Sprache: | eng |
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Zusammenfassung: | Four new Brazilian species from the genus Paspalum are described and illustrated:P. phaeotrichum, P. vexillarium, P. veredense, and P. clipeumPaspalum phaeotrichum is an annual with no obvious affinity to any known species of Paspalum, although it shares several characters with species of both P. subg. Ceresia and the ‘Bertoniana’ group. Paspalum vexillarium is presumably related to P. ceresia, with which it has been confused. Paspalum veredense shows affinities with both P. ellipticum and P. erianthoides. Paspalum clipeum is probably related to annual species of the ‘Plicatula’ group, although it lacks the dark brown upper florets typical of that group. Moreover, P. spissum, a species currently considered as a synonym under P. carinatum, 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. Resumo —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. |
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ISSN: | 0363-6445 1548-2324 |
DOI: | 10.1600/036364408784571671 |