Diversity of flora and vegetation at high belt, over 1600m above the sea level of Hoanglien national park, Laocai province

The first result in this paper is list of natural vegetation types of study area according to UNESCO (1973) with 12 types in 3 classes. The second result is list of species of flora and the diversity of flora, 1553 species belonging to 709 genera, 189 families and 4 divisions of vascular plants were record for the high belt of Hoanglien NP (over 1600m alt.), there are 5 new records for the flora of Vietnam (one monotype families, one monotype genus and 3 other species). Magnoliophyta is most diversity in divisions; 10 richest families and 10 richest genera were list. The third result is about biogeographical elements of plants, special with 20.99% of species is edemic for Vietnam’s flora and 4.46% is local endemic. The lats result is resources of plants, including 656 useful species (42.42%) and 58 species are listed in Vietnam Red data book, IUCN categories, CITES and Vietnam Government Decree 32.