Three New Species of Poa from the Andes of Colombia and Peru

NEGRITTO, M.A. & ANTON, A.M.

SYSTEMATIC BOTANY

American Society of Plant Taxonomists

Año: 2006 vol. 31 p. 83 - 88

0363-6445

ABSTRACT. During a revision of Andean Poa, three new species, one from Colombia and two from Peru, were recognised as new and are described here. Poa soderstromii from the Pa´ramo of Chisaca´, Colombia, is similar to the Peruvian Poa brevisBSTRACT. During a revision of Andean Poa, three new species, one from Colombia and two from Peru, were recognised as new and are described here. Poa soderstromii from the Pa´ramo of Chisaca´, Colombia, is similar to the Peruvian Poa brevisPoa soderstromii from the Pa´ramo of Chisaca´, Colombia, is similar to the Peruvian Poa brevis from which it differs by having the glumes nearly as long as the spikelet and the lemmas conspicuously 5-nerved and scabrous on the keel. Poa oscariana, from Cusco, is similar to P. gilgiana and P. huancavelicae; from both it can be separated by the spikelets broadly elliptic in outline, 4.5–5.5 mm long and dull pale green, and glumes and lemmas asperulous, without hyaline margins. Poa pilgeri from Juný´n, Huancayo, resembles P. candamoana, but differs by its filiform and convolute leaves and small spikelets. The species are described, illustrated and compared with similar species. A key as well as commentaries on the subgeneric affinities of the new species are included.Poa oscariana, from Cusco, is similar to P. gilgiana and P. huancavelicae; from both it can be separated by the spikelets broadly elliptic in outline, 4.5–5.5 mm long and dull pale green, and glumes and lemmas asperulous, without hyaline margins. Poa pilgeri from Juný´n, Huancayo, resembles P. candamoana, but differs by its filiform and convolute leaves and small spikelets. The species are described, illustrated and compared with similar species. A key as well as commentaries on the subgeneric affinities of the new species are included.Poa pilgeri from Juný´n, Huancayo, resembles P. candamoana, but differs by its filiform and convolute leaves and small spikelets. The species are described, illustrated and compared with similar species. A key as well as commentaries on the subgeneric affinities of the new species are included.