Darwiniana ISSN: 0011-6793 [email protected] Instituto de Botánica Darwinion Argentina Gutiérrez, Hugo F. LAS ESPECIES AMERICANAS DEL GÉNERO CENCHRUS S.L. (POACEAE, PANICOIDEAE, PANICEAE) Darwiniana, vol. 3, núm. 1, 2015, pp. 114-200 Instituto de Botánica Darwinion Buenos Aires, Argentina Available in: http://www.redalyc.org/articulo.oa?id=66940406007 Abstract Recent phylogenetic studies provide evidence that the group of species considered under Pennisetum, Cenchrus , and Odontelytrum have a common origin and, therefore, their unification and transfer to the genus Cenchrus has been proposed. Nevertheless, no taxonomic treatment which includes all species is available up to now. The purpose of this study is to perform a taxonomic revision of the American spe - cies of the genus Cenchrus s.l. (excluding the monotypic genus Odontelytrum , native to Africa). An ex - panded description of the genus and a key to identify the species is given. For each species, detailed des - criptions, the current synonyms, geographic distribution, observations, and illustrations are presented. In total, 41 species are recognized (11 endemic and, 8 are adventitious and/or naturalized). Lectotypes are here designated for the following taxa: Gymnotrix chilensis , G. mexicana, G. geniculata, Pennis etum villosum var. humile, P. lanuginosum , Cenchrus crinitus, C. mutilatus, C. palmeri, C. setosus, C. spinifex and, C. muricatus Phil . Four new synonyms ( Gymnotrix distachya , G. rigida var. longiseta, Pennisetum nervosum var. laxiusculum and C. echinatus fo. longispina ) are proposed and, one neotype is suggested for Pennisetum latifolium . In addition, the geographical distribution of C. mutilatus expands to Bolivia. Keywords Cenchrus, Paniceae, Panicoideae, Pennisetum, Poaceae, taxonomy. How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative.