云南桫椤科植物的分类和地理分布

通过野外调查、查阅有关资料及标本,对云南境内桫椤科植物的分类、地理分布、丰富程度和生态习性进行了系统研究。云南省境内桫椤科植物共3属11 种,占我国(3 属约 20 种)总种数的 55%,其地理分布可划分为5个区,其中,滇东南区种类最为丰富,共有9种,占全省总种数的 81.8%;其次是滇南、滇西南区和滇西、滇西北区;中部高原区和滇东北区最少。

Classification and Geographical Distribution of Cyatheaceae Species in Yunnan

Based on the field investigation and specimens of Cyatheaceae in PYU,this paper deals with the classification,geographical distribution,abundant degree and ecological habits of Cyatheaceae in Yunnan province.There is a rich resource of Cyatheaceae in Yunnan.In total there are three genera and eleven species.They account for 55% of all species of China(total three genera and about twenty species).They belong to the national key conservation wild plants.The geographical distribution of Cyatheaceae in Yunnan can be divided into five regions,i.e.northeastern,central-plateau,western and northwestern,southern and southwestern,southeastern.The Cyatheaceae plants are very abundant in the southeastern areas,with nine species.Which account for 81.8% of all species in Yunnan.Next in southern and southwestern areas,western and northwestern areas,but very rare in the central-plateau area and northeastern area.Finally,serveral proposals on preserving these plants are high recommended.