Analysis on the flora of seed plants in Honggolj National Nature Reserve for Pinus sylvestris var.mongolica forest(I):Analysis of the family,genera and species

By investigating and further analyzing the plant resources in Honggolj National Nature Reserve for Pinus sylvesris var.mongolica,studies on the composition of family and genera,and the type of distribution,and flora characteristics of seed plants in this area.The result shows that :1)The types of plant are various and there are wild seed plants of 74 families,284 genera and 664 species.Constituents of flora are abundant and the seed plants consist of 13 types of distribution area and 13 varied types of distribution area.2)The flora expresses the northern temperate zone which constitutes 87.18% of non-world distribution species.The elements of sub tropical zone,tropic and cool temperate zone are found among the constituents of flora,which indicates a characteristic of mixed type of south and north.3)There are 39 mono-genus families and 25 mono-species genera and constitutes 33.78% of total families and 8.8% of total genera respectively.4) It shows a remarkable characteristic of alpine forest steppe.