Abstract: The primary goal of this project was to document floristic diversity in the Khau Ca forest, adjacent to the Du Gia protected area of Ha Giang Province. This botanical survey, carried out during May and October, 2005, recorded 471 vascular plant species belonging to 268 genera, 113 families and 4 phyla. We identified 179 medicinal plants, 15 species listed in Decree No. 32/2006/ND-CP, 14 species listed in Vietnam Red Data Book, and one species Amentotaxus argotaenia is listed in the 2006 IUCN Red List of Threatened Species.
The most common tree species in the Khau Ca forest are Excentrodendron tonkinense (Tiliaceae), Garcinia spp. (Clusiaceae), Pometia pinnata (Sapindaceae), Diospyros spp. (Ebenaceae), Dendrocnide urentissima (Urticaceae), Bridelia balansae (Euphorbiaceae), Rhododendron spp. (Ericaceae), Illicium spp. (Illiciaceae), Vernicia spp. (Euphorbiaceae), Acer spp. (Aceraceae), Schefflera spp. (Araliaceae) and Quecus sp (Fagaceae).
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