Abstract:

The Dawei Mountain is one of the national nature reserves, which has the richest rare endangered plants and the most abundant biodiversity. The results from this study showed that there were 3 299 species of the wild vascular plants belonging to 1 121 genera and 238 families in this area, accounting for 65.38%, 34.92% and 12.15% respectively of the species, genera and families of vascular plant resources in China, among which there were 3 027 species of seed plants belonging to 994 genera and 188 families. The antiquity, rarity, diversity and integrity of seed plants in the reserve were very representative. There were 4 distinct features for the flora of the seed plants: 1) species composition is complex, while the number of species in genera is small and species differentiation in genera is weak; 2) the origin of flora is ancient, and the age_old and particular genera are abundant; 3) many floras converge in this area, and the families distributed in the tropics are dominant; 4) the floras here have close affinity with Indochina floras especially for the North Bay floras, mean while which also with East_Asia floras.

Key words: Dawei Mountain, flora, diversity, endemic genera