山东泰山种子植物区系的研究

泰山位于山东中部，共有种子植物１００科４０７属７５７种。世界性单型属和少型属共有５１属，占总属数的１２．５％，并有不少起源古老的科、表明了本区系起源的古老性。中国种子植物区系的１５种类型在泰山均有分布，其中北温带分布居首位，占３４．５％，泛热分布次之，占１９．１％，再次是旧世界温带分布和东亚分布，分别占１４．３％和１０．１％。类温带性质属共有２５７属，占７２．２％，而热带质属有则９９属，占２７．８

STUDIES ON THE SEED PLANTS FLORA OF TALSHAN MOUNTAIN IN SHANDONG PROVINCE

Taishan mountain is located in central Shandong Province.There are 757 species seed plants belonging to 407 genera and 100 families (3 sp.of 3 gen.among 2 fam.of gymnosperms and 754 sp.of 404 gen.among 98 fam.of angiosperms) in this flora.In the 407 genera, there are 11 world monotypic genera and 40 world oligotypic ones, which make up 12.5% of the total.Most of them are phylogenetically ancient or primitive.This means the seed plants flora of Taishan mountain is characteristically of ancient origin.According to Prof.C.Y.Wu's theory on the areal-types of the genera of China's seed plants flora, all the 407 genera in this flora can be classified to 15 types, mainly comosing of North Temperate(34.5%),Pantropic(19.1%) ,Old World Temperate(14.3%)and East Asia(10.1%).The genera of temperate areal-types make up 72.2%,taking a predominated position, while those of tropical ones only acount for 27.8%,which shows that the seed plants flora of Taishan mountain is of a temperate feature,and has something with tropical flora.