Component species and flora of Quercus aliena var. acuteserrata community in Mt. Qinling

There were 495 species,227 genera, and 82 families of vascular plants, including 123 species of arbor, 100 species,of shrubs, 240 species of herbs and 32 species,of strata plants and 15 families 19 genera 19 species of non-vascular bundle plants inchuding 13 species 13 genera 9 familiesof mass and pteridophyte 6 species, 6 genera and 6 families of pteridophyte in the community of Mt.Qingling. Proportion of occasional species or rare species was high, which indicated habitat heterogeneity of the community with abundant species. In Qinling Mountains, flora composition of Quercus aliena var. acuteserrata , stands was from several geographical elements. Accounting for 53.99% of the total, the temperate components with 115 genera were in the first position, and the north temperate with 92 genera accounting for 43.19% of the total were predominant in the temperate elements. These north temperate plants were common in each layer of the community, as well as in the main edificators and companion plants. This showed that flora of the community had affinities with the temperate zone. Proportion of the tropic elements was fairly high indicating a relationship between this community and the tropical flora. At the same time, its species were complicated and various, and connection in geography was widespread. All these indicated the transitional character of the community flora in consistent with its geographical position and climate character.