Study On The Flora Of Seed Plants In The Dalai Lake Nature Reserve Of Inner Mongolia

The study was based on the field suruey, sample collection and classification of Dalai Lake Nature reserve in Inner Mongolia to statistcs and analysis the flora of seed plant′s characteristics in year of 2008-2009.According to the compartmentalizing criterion of Zhengyi Wu's"Areal-types of the world families","genera of seed plants in china"and Peiyun Fu's"Areal-types of Seed Plants Species in North East China", to analysis the family,genus,species of seed plants in Dalai Lake Nature reserve of geographical composition. As referencing"Wild Plants Resources"and"Inner Mongolia Endangered Plants Atlas", listed the resources plant and endangered plant in the reserve. The conclusions are as following:(1) The seed plants of Dalai Lake Nature reserve involved 73 families, 292 genus and 648 species, of which Gymnosperm involved 2 families, 2 genus and 2 species, and angiosperm involved 71 families, 290 genus and 646 species. There are 57 families, 231 genus and 508 species in Dicotyledoneae, 14 families, 59 genus and 138 species in Monocotyledoneae.(2) The life form of Dalai Lake Nature reserve was dominated absolutely by perennial herb. The arbor were the least among them. Mesophytes were the large proportion in plants of reserve, followed by Xerophytes.(3) The composition of geography was complex, and the temperate characteristics were obvious in the seed plants of Dalai Lake Nature reserve . The flora were divided into the temperate distribution for 55 families, the percentage of them were 75.35% in all of families in seed plants. Temperate floristic elements significantly dominant in genera as well, in which portion of North Temperate distribution was the highest, account for 50.85% in the total number of genera in this area. Followed the type of Old World Temperate, account for 16.81% in the total number of genera in this area .The portion of Temperate Asia distribution was the highest in species, account for 16.00% in the total number of species in this area, followed the type of Old World Temperate, account for 14.08% in the total number of species in this area.(4)The wild plant resources of the reserve were rich, including 395 kinds of forage seed plants, 284 kind of medicinal seed plants ,94 kind of industrial seed plants, 5 kinds of treasure endangered plants.