A New Species of Paspalum (Poaceae, Paniceae) from Central Brazil (original) (raw)
Related papers
Phytotaxa, 2018
A new species, Paspalum cangarum, morphologically similar to P. brachytrichum, is described. While both occur in canga vegetation, P. brachytrichum is endemic to the state of Minas Gerais and the new species is restricted to the Serra dos Carajás, state of Pará, Brazil. These species can be distinguished from each other mainly by their height, length and number of racemes and by the lengths of their pedicels and spikelets.
Four New Species of Paspalum (Poaceae, Paniceae) from Central Brazil, and Resurrection of an Old One
Systematic Botany, 2008
Four new Brazilian species from the genus Paspalum are described and illustrated: P. phaeotrichum, P. vexillarium, P. veredense, and P. clipeum. Paspalum 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.
Four New Species of Paspalum (Poaceae, Paniceae) from Central Brazil, and Resurrection of an Old One
Systematic Botany, 2008
Four new Brazilian species from the genus Paspalum are described and illustrated: P. phaeotrichum, P. vexillarium, P. veredense, and P. clipeum. Paspalum 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.
A New Awned Species of Paspalum (Poaceae, Panicoideae, Paniceae) from Brazil
Novon: A Journal for Botanical Nomenclature, 2011
Brazil, is described and illustrated. The new species is awned and is related to P. biaristatum Filg. & Davidse and P. longiaristatum Davidse & Filg., to which it is compared. Distinguishing features of P. rostratum include shorter awns and a rostrate upper lemma, as well as the free branching and flowering from the upper nodes, with the successive branches forming cymose branching systems. RESUMO. Uma nova espécie de Paspalum L. (Poaceae, Panicoideae, Paniceae), P. rostratum D. Ramos, Valls & R. C. Oliveira, do Distrito Federal, Brasil, é descrita e ilustrada. Essa nova espécie é aristada e é relacionada a P. biaristatum Filg. & Davidse e P. longiaristatum Davidse & Filg. e a elas é comparada. As características que distinguem P. rostratum incluem aristas mais curtas e lema superior rostrado, além dos colmos muito ramificados nos nós superiores, formando um sistema de ramificação cimoso.
Phytotaxa, 2015
Paspalum cerradoense R.C. Oliveira & Valls, a new species from the "Chapada dos Veadeiros" region, in the Cerrado biome, Brazil, is here described and illustrated. It is included in the informal Notata group of Paspalum, because of the inflorescences with two distal conjugated racemes. The new species has a chromosome number of 2n=20, which is in agreement with the basic chromosome number of other species of the Notata group. As there are similarities between Paspalum cerradoense, P. cromyorhizon, and P. ionanthum, morphological and anatomical characters of these three species are compared. There are at least 30 differences between these species, which corroborate the consistency of their circumscriptions.
Genetic Resources and Crop Evolution, 2007
Genus Paspalum L. comprises approximately 400 species worldwide and about 220 in Brazil. Paspalum is ecologically and economically important, and has been very useful as pasture. Traditionally, taxonomists use informal groups, most of which described by Agnes Chase in 1929. Some groups present a problematic circumscription, this is the case of the Linearia and Notata groups. This work uses a phylogenetic approach to study these groups and related species. DNA sequences from ITS of nuclear rRNA, from chloroplast intergenic spacer psbA-trnH and chloroplast trnL intron were used to perform the analyses. The informal groups studied were considered highly artificial, being the representatives from several informal groups splitted throughout the trees. Only a small core of species from Notata group could be accepted as a good formal clade.