江苏徐州种子植物区系分析

Analysis of seed plant flora of Xuzhou city in Jiangsu

利用样地调查法,结合文献查阅对徐州市域内野生植被资源进行了分析。结果表明,徐州市现有种子植物120科366属747种。对其种子植物区系组成分析表明,徐州种子植物以温带分布类型最多(196属),占国产温带分布总属数的18.35%,其次是热带分布(111属),占国产热带分布总属数的7.28%,体现了该地区植物南北过渡、东西交融的分布特征。分析认为,温带分布类型在徐州市得到了良好发育,为构成该地植物群落的主要成分。

In virtue of Relev＆#233; method, and referring to a great deal of literature, a systematic vegetation survey was con-ducted in Xuzhou city, Jiangsu. There were 747 species of seed plants there, which belonged to 120 families and 366 genera. The analysis of seed plants families in Xuzhou, Jiangsu province showed that the temperate areal-types were dominant and their genera number were 196, which accounted for 18.35% of total genera number in China. The second place was the tropic areal-types, the genera number of which was 111, occupied 7.28% of total genera number in China. Areal types of genera of seed plants in here played typical characteristic of south-north transition. The temperate areal-types were full developed and became the dominant elements of seed plants in Xuzhou.