Synoptic taxonomy of Cortaderia Stapf (Danthonioideae, Poaceae) Author Testoni, Daniel Herbario BBB, Departamento de Biologia, Bioquimica y Farmacia, Universidad Nacional del Sur, San Juan 670, CP- 8000 Bahia Blanca, Argentina daniel.testoni@uns.edu.ar Author Linder, H. Peter Department of Systematic and Evolutionary Botany, University of Zurich, Zollikerstrasse 107, CH- 8008 Zurich, Switzerland text PhytoKeys 2017 2017-01-11 76 39 69 http://dx.doi.org/10.3897/phytokeys.76.10808 journal article http://dx.doi.org/10.3897/phytokeys.76.10808 1314-2003-76-39 FFBD980EFF8A8924FFD5FF9FFF903809 238999 7. Cortaderia vaginata Swallen, Sellowia 7: 9. 1956. Figs 1D , 2D,G Type . Brasil , Santa Catarina , Bom Retiro , Campo dos Padres , 16 Dec. 1948 , R. Reitz 2398 ( lectotype , designated as holotype by Connor & Edgar , Taxon 23: 603 (1974): US 00133444!; isolectotype: HBR). Etymology. vagina (Latin) = sheath. Possibly referring to the conspicuous leaf-sheaths, a feature that is common to most of the genus. Common names. Penacho, Capim-Penacho. Taxonomy. According to Swallen (1956) this species resembles Cortaderia parviflora , but differs by the glabrous lemmas and long-villous calli. It is unusual among the species assigned to Cortaderia by the glabrous lemma, and the almost glabrous pedicels and inflorescence axes. This species may be a local endemic, and might be quite rare. It is probably most closely related to Cortaderia modesta , which also has a reduced awn, but differs by the sheaths which are lacerated, lax panicles (without axillary panicles), and the glabrous lemma. Geographically it can be immediately identified as the only Cortaderia species from Santa Catarina in southern Brazil. The leaf anatomy is identical to that of Cortaderia modesta , except that all sections appear to have large empty cells in the middle of the leaf (Fig. 2D ), between the vascular bundles. These were seen on some sections of Cortaderia modesta , but rarely.