Check list of flora of the Mt. Quetzal (Polygon III) of The Triunfo Biosphere Reserve, Chiapas, Mexico

A floristic checklist was made for Mt. Quetzal (Polygon III) and adjacent areas at the Triunfo Biosphere Reserve, Chiapas, Mexico. A database of 1,513 specimens was created comprising 140 families, 432 genera, 795 species, and 24 infraspecies. The total number of species recorded in this study represented about 9% of the estimated flora of Chiapas and nearly 26.5% of the estimated flora for The Triunfo region. The number of species is also similar to that recorded for polygons I and II (751 and 791 respectively) but higher than Mt. Cebu (Polygon V) (502 species). The vegetation communities determined in the Mt. Quetzal were: conifers forest, cloud forest, tropical rain forest, subdeciduous tropical forest, and ruderal vegetation. The vegetation type more important based on the number of species and the best recollected was the cloud forest. This checklist also included novel taxa: a new species of Ceratozamia (Zamiaceae) and a new species of Sterculia (Sterculiaceae) and the presence Monstera dubia (Araceae) and Albizia carbonaria (Fabaceae) unrecorded for Chiapas.