Abstract: Baiyun Mountain is located in Lishui of Zhejiang Province.The natural vegetation of Baiyun Mountain is well preserved.Baiyun Mountain is rich in plant species, according to statistics, there are 831 species (including varieties)of plant have been discovered, belong to 421 genera and 117 families.21 families belonging 233 genera and 498 species which have formed the majority of the plant flora in BaiyunMountain.The origin of flora in Baiyunshan is very ancient, hence a large number of ancient and original species are well preserved, regional Monotypic genera and Oligotypic genera amounts to 405 in number, which constitutes 96.2% of total number of genera.The area is rich in rare and endangered plants.The geographical components in BaiyunMountain are various, 421 genera of the regional seed plant can be roughly divided into 14 areal types and 13 areal subtypes.The majority of plant flora is of temperate zone.This area is at the edge oftropical zone, which is quite near to the subtropical zone and temperate zone.

Key words: seed plant, flora, Baiyun Mountain, Lishui