Two New Species of Urochloa (Paniceae; Panicoideae; Poaceae) from Western Mexico and the Updated Checklist with a Key to Species of the Genus in Mexico.

The article discusses a study which described new species of Urochloa (U.) from Western Mexico, including U. olivacea and U. pauciflora. Particular focus is given to the characters of Urochloa and Brachiaria. It notes that U. olivacea is an annual plant rooting at the lower nodes. Its sheaths are also shorter or longer than the internodes. Whereas, U. pauciflora is an annual plant with shorter sheats and exposed nodes. Also included are data on distribution, phenology and etymology.