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Type: Article
Published: 2016-07-13
Page range: 263–278
Abstract views: 21
PDF downloaded: 1

Systematics of Ichnanthus hoffmannseggii and allies (Poaceae, Paspaleae) based on molecular and morphological evidence

Universidade Estadual de Feira de Santana, Departamento de Ciências Biológicas, Programa de Pós-graduação em Botânica, Av. Transnordestina s.n., Feira de Santana, Bahia 44036-900, Brazil.
Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299, USA
Instituto de Biologia, Universidade Federal da Bahia, Av. Barão de Geremoabo s.n., Ondina, Salvador, Bahia 40150-170, Brazil
Universidade Estadual de Feira de Santana, Departamento de Ciências Biológicas, Programa de Pós-graduação em Botânica, Av. Transnordestina s.n., Feira de Santana, Bahia 44036-900, Brazil.
Taxonomy grasses Panicoideae phylogeny SEM Monocots

Abstract

Ichnanthus hoffmannseggii is an annual panicoid grass that occurs in sandy and open areas of Brazil and currently includes I. piresii in its synonymy. However, herbarium and field work led us to question this circumscription. In a previous phylogenetic study, a specimen with morphological affinities to I. hoffmannseggii was recovered as more related to Echinolaena oplismenoides (currently I. oplismenoides). This study aimed to clarify the relationship between I. hoffmannseggii, I. oplismenoides, and I. piresii using molecular and macro- and micromorphological data. We recognize these three taxa as distinct species and provide characters for distinguishing them and related species, including descriptions, comments, illustrations, distribution maps, SEM images of the upper anthecium, and phylogenetic relationships.