Abstract

ALBESIANO, SOFIA  and  FERNANDEZ-ALONSO, JOSÉ LUIS. Catalogue of the vascular plant from the Chicamocha river canyon (tropical zone), Boyacá-Santander, Colombia . First part. Caldasia [online]. 2006, vol.28, n.1, pp.23-44. ISSN 0366-5232.

The vascular flora of the semi-arid region of the canyon of the Chicamocha river is represented by 76 families, 297 genera and 429 species. Poaceae (21géneros/34 species), Asteraceae (28/30), Fabaceae (19/29), Malvaceae (11/24), Euphorbiaceae (11/23) and Cactaceae (13/20) have the greatest diversity. Sida-Malvaceae (10), Lantana-Verbenaceae (6), Euphorbia and Solanum (5); are the genera with higer number species; however, 87.2% of the genera have only 1-2 species. The dominant biotype correspond to the herbaceous plants (176 spp, 41%), followed by the bushes (106, 25%) and sub schrubs (46, 11%). There is a high diversity of species with succulent tissues (54 spp, 12,9%), belonging to Cactaceae (20) and Euphorbiaceae (8). Information about the most characteristic species is also included of the different types of habitat in the region and on the taxonomy and chorology new features that resoult from the study of this flora.

Keywords : Biotypes; Floristic Catalogue; Chicamocha; Colombia; Chorology; Diversity; Vascular Flora; Arid Zones.

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