On-line version ISSN 0717-6643
GARCIA, Nicolás. Characterization of the vascular flora of Altos de Chicauma, Chile (33ºS). Gayana Bot. [online]. 2010, vol.67, n.1, pp. 65-112. ISSN 0717-6643. http://dx.doi.org/10.4067/S0717-66432010000100007.
A total richness of 602 specifc and infra-specifc taxa is reported for the locality of Altos de Chicauma, situated in the Metropolitan Regions Coastal mountain range, Chile (33º S), between 500 and 2.200 m of altitude. Chiles endemic taxa constitute 41% and the Southern Cone endemics equal 66% of the total flora, while 14% corresponds to alien flora. The total flora is characterized according to its presence in seven habitat-types. A commented systematic list is presented where each taxon is characterized according to its growth habit, geographic origin, relative frequency, and presence per habitat-type in Chicauma. Herbarium material supporting the presence in this locality is indicated for 572 taxa (95%). The total flora and the habitat-types partial floras were characterized according to their richness, origin and biologic-types compositions. A similarity analysis between the habitats native floras indicates that the species composition differs signifcantly to the rest in high-mountainous hydric environments, creeks and ravines, xeric, and in the pairs, valley sclerophyllous - montane sclerophyllous and deciduous - high-mountainous habitats. The presence of 14 endangered species, nine Central Chiles Coastal mountain range endemics, 13 Metropolitan-Valparaiso regions mountain endemics, and fve distributional limits are reported for this locality.
Keywords : Central Chile; Coastal mountain range; richness; composition; endemism.