The genus Pterocaulon Ell. (Asteraceae-Plucheeae) in Rio Grande do Sul State, Brazil
Keywords:
Asteraceae, Plucheeae, Pterocaulon, taxonomy, southern of Brazil.Abstract
The genus Pterocaulon comprises a group of meadowy herb or subshrub plant species, with a very homogeneous floral and vegetative organization. The genus shows a bicentric distribution divided between America and a part of the Australian and the southeastern Asian regions. In Rio Grande do Sul State it is represented by nine species as follows: Pterocaulon alopecuroides (Lam.) DC., P. angustifolium DC., P.balansae Chodat, P. cordobense Kuntze, P. lorentzii Malme, P. polypterum (DC.) Cabrera, P. polystachyum DC., P. rugosum (Vahl.) Malme and P. virgatum (L.) DC. The present study provides an analitical key, species descriptions, phenological and geographical data, as well as illustrations of the species occuring in the Rio Grande do Sul State.
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References
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