An updated checklist and key to the open-panicled species of Poa L. (Poaceae) in Peru including three new species, Poa ramoniana, Poa tayacajaensis, and Poa urubambensis

Abstract

We provide an updated checklist and key to the 30 Poa species with open panicles from Peru which includes previously circumscribed Dissanthelium and Aphanelytrum species, new taxon records, and three undescribed species. Poa compressa, Poa grisebachii, and Poa leioclada are recorded from Peru for the first time. A number of species are placed in synonymy: Poa carazensis, Poa ferreyrae and Poa tovarii are synonymized under the name Poa fibrifera; Poa adusta (tentatively) and Poa pilgeri are synonymized under Poa candamoana; Poa superata is synonymized under Poa grisebachii; and Poa paramoensis is synonymized under Poa huancavelicae. Included within this treatment are three new species, Poa ramoniana, Poa tayacajaensis and Poa urubambensis, which are described and illustrated. Poa ramoniana, found growing near lakes in high elevation Puna grasslands of Junín, is similar to a small form of Poa glaberrima, but differs in having rhizomes and growing to only 5 cm tall. Poa tayacajaensis, found from shrublands on Andean slopes of Huancavelica and Huánuco, bears similarities to Poa aequatoriensis but differs in having shorter lemmas which are pubescent between the veins, densely scabrous sheaths with smooth, glabrous throats, and shorter ligules. Poa urubambensis, a common element of the undisturbed Polylepis forest understory of the Cordillera Urubamba, Cusco, is distinct from all other members of open-panicled Poa’s by having glabrous lemmas with a smooth and glabrous callus, and notably small anthers. The type material for the name Poa adusta is discussed and a lectotype is selected.

Four new and five overlooked records of vascular plants from high elevation puna grasslands of the southern Peruvian Andes

“…Certain species were discovered that were not included in the Catalogue of the Flowering Plants and Gymnosperms of Peru (Brako & Zarucchi, 1993), additions to this (Vásquez et al, 2002;Ulloa Ulloa et al, 2004;Smith et al, 2005;Rodríguez et al, 2006;Salvador et al, 2008;Linares et al, 2010;Huamantupa et al, 2014;Gonzáles et al, 2011Gonzáles et al, , 2016Sylvester et al, 2016a), or the online checklist for Peru (W 3 TROPICOSPeru Checklist, 2017), but were mentioned in taxonomic treatments that were overlooked by the aforementioned works. These belong to the genera: Calamagrostis, Festuca (Poaceae), Aphanes, Lachemilla (Rosaceae), and Valeriana (Valerianaceae).…”

“…Species names were checked against the Catalogue of the Flowering Plants and Gymnosperms of Peru (Brako & Zarucchi, 1993), additions to this (Vásquez et al, 2002;Ulloa Ulloa et al, 2004;Smith et al, 2005;Rodríguez et al, 2006;Salvador et al, 2008;Linares et al, 2010;Huamantupa et al, 2014;Gonzáles et al, 2011Gonzáles et al, , 2016Sylvester et al, 2016a), and the online checklist for Peru (W 3 TROPICOSPeru Checklist, 2017).…”

Agrostis meyenii Trin. (Poaceae, Agrostidinae): first records from Peru, including taxonomic notes and an identification key

“…The presence of Agrostis species in Peru was checked against the Catalogue of the Flowering Plants and Gymnosperms of Peru (Davidse et al 1993), additions to this (Vásquez et al 2002;Ulloa Ulloa et al 2004;Smith et al 2005;Rodríguez et al 2006;Salvador et al 2008;Linares et al 2010;Huamantupa et al 2014;Gonzáles et al 2011Gonzáles et al , 2016Sylvester et al 2016Sylvester et al , 2017, and online checklists for Peru (Plants of the World Online 2020; W3TROPICOS-Peru Checklist 2020). In this treatment, glabrous means without pubescence (in the sense of slender, relatively soft hairs unless otherwise stated).…”

A revision of Poa subsection Aphanelytrum (Poaceae, Pooideae, Poaeae, Poinae); and a new species, Poa auriculata

“…Macbride 4354 at US) and one other possible collection (Depto. de Cajamarca, Celendin, I. Sánchez Vega 2668 at MO) [Sylvester et al in press]. …”