Novedades taxonómicas y sinopsis del género Digitaria (Poaceae, Panicoideae, Paniceae) en Colombia y Venezuela

Abstract

Vega, A. S. & Rugolo de Agrasar, Z. E. 2005. Taxonomic novelties and synopsis of the genus Digitaria (Poaceae, Panicoideae, Paniceae) in Colombia and Venezuela. Darwiniana 43(1-4): 232-267. Digitaria cuatrecasasii, a new species from Honduras, Panama, Colombia and Venezuela, is described and illustrated. The taxonomic position of D. cuatrecasasii is discussed, and its inclusion in sect. Leianthae is proposed. A comparative table and some remarks about the related taxa are included. Digitaria californica var. villosissima, D. corynotricha, D. curvinervis, D. fragilis and D. sacchariflora are reported for the first time for Colombia. Digitaria aequiglumis var. aequiglumis, D. argillacea var. nulliseta, D. ciliaris var. rhachiseta, D. costaricensis, D. eriantha, D. filiformis var. laeviglumis, D. lehmanniana var. dasyantha, D. parva, D. sacchariflora and D. ternata are cited for the first time for Venezuela. Digitaria cardenasiana and D. villiculmis are here sinonimized under D. corynotricha, and D. aequatorienis under D. pittieri. The following new records for countries are included as follows: D. argillacea var. argillacea for Peru, D. argillacea var. nulliseta for Guatemala, D. curvinervis for Ecuador and Mexico, D. eriantha for Ecuador, D. fragilis for Nicaragua and Panama, D. lehmanniana var. lehmanniana for Cuba and D. leucites for Mexico. This paper includes synonymy, iconography, geographical distribution and ecology, vernacular names, specimens examined; a key for the identification of taxa is also given. Eleven species are illustrated for the first time.