Taxonomic Revision of the Genus Podagrostis (Poaceae, Pooideae, Poeae)

Ana María Molina; Zulma E. Rúgolo; María de los Ángeles Ferrero; Patricia C. Palacio; Carolina  Guerreiro; Andrea S. Vega

doi:10.3417/2021642

Ana María Molina Instituto de Recursos Biológicos, Instituto Nacional de Tecnología Agropecuaria
Zulma E. Rúgolo Instituto de Botánica Darwinion (CONICET-ANCEFN)
María de los Ángeles Ferrero Universidad de Buenos Aires
Patricia C. Palacio Universidad de Buenos Aires
Carolina Guerreiro Instituto de Botánica Darwinion (CONICET-ANCEFN)
Andrea S. Vega Universidad de Buenos Aires

DOI: https://doi.org/10.3417/2021642

Keywords: Agrostidinae, America, SEM, taxonomic novelties, Trichodium net

Abstract

A taxonomic revision of the genus Podagrostis (Griseb.) Scribn. & Merr. is presented, including two new combinations: P. meridensis (Luces) A. M. Molina & Rúgolo and P. novogaliciana (McVaugh) A. M. Molina & Rúgolo. Podagrostis bacillata (Hack.) Sylvester & Soreng constitutes a new report for Colombia. Information regarding synonymy, geographical distribution, habitat, iconography, and vernacular names is provided along with complete illustrations and a list of additional specimens examined. A key for the identification of the species is included as well as a comparative table based on macro- and micromorphological data. The anatomical character of Trichodium net on lemma epidermis, as well as its diagnostic value, is discussed in species of Podagrostis and most related genera (e.g., Agrostis L., Chaetotropis Kunth, and Polypogon Desf., among others).