秦岭种子植物区系中的北温带区系成分研究

Study on the north temperate of the seed plant in Qinling Mt.

北温带成分是秦岭种子植物区系组成中的优势成分 ,共有 2 2 5属 ,属数占秦岭所有种子植物总属数的 2 4 .0 8% ,占中国种子植物区系北温带成分总属数的 74 .5 0 %。该类成分在秦岭地区不仅丰富 ,而且是本区植被区系组成的优势成分 。

The north temperate of the seed plant flora in Qinling Mt. is studied in this paper. The result shows: the north temperate is a dominant element of the composition of the seed plant flora in Qinling Mt., there are 225 genera in this range, the amount of genera about north temperate account for 24.08% of the total genera in Qinling Mt. and 74.50% of the north temperate of China seed plant flora. The north temperate in this Mt. is not only rich in kind, but also the dominant element in the flora of the vegetation .The nature of the flora is temperate characteristics, and the origin of north temperate has the clear tropical nature.