Flora de la zona xerofítica de la cuenca media del río Chama, estado Mérida, Venezuel

Abstract

This paper deals about the elaboration of a preliminary checklist of Spermatophyta from xerophytic zone in Merida state, Venezuela. A review of floristic was done, also ecologic studies from this area, voucher specimens from Herbario MER and field visits. Our results indicate that at least 232 species, belonging to 163 genus and 51 families , in this ecosystem. The most important family in this area are is Asteraceae, with 35 species and 15% of total, Cactaceae (20 species, 8,6%), Verbenaceae (15 species, 6,4%), Poaceae (14 species, 6%), Mimosaceae (14 species , 6%), Papilionaceae (13 species, 5,6%) and Boraginaceae (12 species, 5,1 % ).