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Issue: Vol. 435 No. 1: 4 March 2020
Type: Article
Published: 2020-03-04
DOI: 10.11646/phytotaxa.435.1.5
Page range: 41–49
Abstract views: 25
PDF downloaded: 1

Chascolytrum serranum (Poaceae: Pooideae: Poeae: Calothecinae), a new microendemic species from Campos de Cima da Serra, southern Brazil

Programa de Pós-Graduação em Botânica, Departamento de Botânica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, CEP 91501-970, Porto Alegre, Rio Grande do Sul, Brazil.
Beaty Centre for Species Discovery & Botany Section, Research and Collections, Natural Heritage Campus, Canadian Museum of Nature, 1740 Pink Road, Gatineau, Quebec, Canada.
Beaty Centre for Species Discovery & Botany Section, Research and Collections, Natural Heritage Campus, Canadian Museum of Nature, 1740 Pink Road, Gatineau, Quebec, Canada.
Departamento de Biologia e Programa de Pós-Graduação em Agrobiologia, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 1000, CEP 97105-900, Camobi, Santa Maria, Rio Grande do Sul, Brazil.
Programa de Pós-Graduação em Botânica, Departamento de Botânica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, CEP 91501-970, Porto Alegre, Rio Grande do Sul, Brazil.
cool-season grass grasslands highlands taxonomy Monocots

Abstract

Chascolytrum serranum, a new species of C. sect. Hildaea restricted to Serra Geral National Park and surroundings, in Cambará do Sul, Rio Grande do Sul, Brazil, is described and illustrated. The new species is morphologically similar to C. ambiguum and C. juergensii var. angustilemma, but is distinguished from them mainly by having paleas more than 2/3 the length of the lemmas (up to 2/3 the length of the lemmas in C. ambiguum and C. juergensii var. angustilemma), glabrous and smooth lemmas (strigose in C. juergensii var. angustilemma), and puberulous paleas (glabrous in C. ambiguum). The species can be recognized in the field by the purplish and shiny spikelets. It inhabits river banks and, less frequently, swamps.