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Issue: Vol. 419 No. 2: 2 October 2019
Type: Article
Published: 2019-10-02
DOI: 10.11646/phytotaxa.419.2.4
Page range: 182–188
Abstract views: 18
PDF downloaded: 1

Aristida surperuanensis (Poaceae, Aristidoideae), a new species from a desert valley in southern Peru

Dirección General de Diversidad Biológica, Ministerio del Ambiente, Lima, Perú.
Facultad de Ciencias Veterinarias y Biológicas, Universidad Científica del Sur, Lima, Perú. Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Lima, Perú.
Instituto Científico Michael Owen Dillon, Arequipa, Perú. Departamento Académico de Biología, Universidad Nacional de San Agustín de Arequipa, Arequipa, Perú.
Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington, D.C., 20013-7012, U.S.A.
Biodiversity grasses Moquegua South America taxonomy Monocots

Abstract

Aristida surperuanensis sp. nov. is described and illustrated. The new species, from southern Moquegua (Peru), differs from A. flaccida in having contracted panicles, spikelets to 1–1.1 cm long and lemmas 5.5–6.5 mm long. The central awn is straight, ascending, 3–6 mm long and lacking a column, the lateral awns are ascending, 1–2.5 mm long and 1/3 as long as the central awns, and the caryopses are fusiform and 4–4.5 (–6) mm long. A key to the species of Aristida in Peru is included and the conservation status of the new species is evaluated.