REVISIÓN DE LAS ESPECIES SUDAMERICANAS DEL GÉNERO PIPTOCHAETIUM (POACEAE, POOIDEAE, STIPEAE)

ANA M.CIALDELLA1, 3 & MIRTA ARRIAGA 2, 3

1 Instituto de Botánica Darwinion, Labardén 200, Casilla de Correo 22, 1642 San Isidro, Buenos Aires, Argentina. E-mail: acialdella@darwin.edu.ar
2 Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Avda. Angel Gallardo 470, 1045 Capital Federal, Argentina. E-mail: marriaga@muanbe.gov.ar

 

ABSTRACT: Cialdella, A. M. & Arriaga, M. 1998. Revision of the South American species of the genus Piptochaetium (Poaceae, Pooideae, Stipeae). Darwiniana 36: 107-157.

This paper deals with a taxonomic revision of the South American species of the genus Piptochaetium. This systematic treatment includes a discussion of the morphological and anatomical characteristics of the genus, together with a key to identify the species treated in 2 sections: Podopogon (Raf.) Parodi (13 species) and Piptochaetium (14 species, 2 subspecies and 2 varieties). For each species, a description, synonymy, geographical distribution, illustrations and photographs of the characters with taxonomical value are given. Some species, varieties or forms have been reduced to synonymy: P. panicoides f. subpapillosum, P. grisebachi, P. stipoides var. chaetophorum, P. stipoides var. parviflorum, P. stipoides var. purpurascens, P. stipoides var. verruculosum and P. uruguense var. microcarpum.

Key words: Taxonomy, Anatomy, Piptochaetium, Poaceae, South America.
Palabras clave: Taxonomía, Anatomía, Piptochaetium, Poaceae, Sudamérica.

1 Miembro de la Carrera del Investigador, CONICET