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Gayana. Botánica

versión On-line ISSN 0717-6643

Resumen

PENAILILLO, Patricio. THE GENUS JARAVA RUIZ ET PAV. (STIPEAE-POACEAE): DELIMITATION AND NEW COMBINATIONS. Gayana Bot. [online]. 2002, vol.59, n.1, pp. 27-34. ISSN 0717-6643.  http://dx.doi.org/10.4067/S0717-66432002000100005.

Jarava Ruiz et Pav. is recognized as South American genus. This genus would include all those species treated frequently as Stipa L. s.l. according to South American agrostologists. Even if different morphological structure can be identify, is important and common in this genus that anthoecia showed morphological characters for a wind dispersion (Stipa subgenus Jarava, Stipa subgenus Ptilostipa and Stipa subgenus Pappostipa). Long hairs at the top of the lemma (pappus) or plumose awns are interpreted as evolutionary novelty. These structures are considered advanced characters for a wind dispersion of diasporas. Species with axillaries aerial cleistogamy should be also included in Jarava. Under this considerations a new delimitation for the genus and new combinations are realized.

Palabras clave : Jarava Ruiz et Pav.; Stipeae; Poaceae; South America; new combinations.

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