粤东药用种子植物多样性调查及区系分析

对粤东药用种子植物资源的多样性进行了调查研究,同时应用植物区系地理学的基本原理,对粤东药用种子植物的科、属组成以及区系成分进行了分析。调查结果表明：①粤东地区药用种子植物有159科,614属,1142种,其中药用裸子植物6科,9属,10种,药用被子植物153科,605属,1132种;②优势现象明显,物种多样性指数高;③粤东药用种子植物属包括了15个分布区类型,热带成分占绝对优势,特有程度较低;④药用植物资源相对丰富,有一定的古老性和脆弱性。

Investigation and Floristic Study on the Medicinal Seed Plants in East Guangdong Province

The species diversity of medical seed plants in East Guangdong province were investigated,and the composition and distribution elements of the families and genera were analyzed too.The results showed that:①There are 1 142 species of medical seed plants in the area,belong ing to 614 genera and 159 families,of which there are 6 families,9 genera and 10 species of gymnosperms,and 153 families,605 genera and 1 142 species of angiosperms; ②The dominant families are distinct and the species diversity are rich.③There are 15 distribution types of the medicinal seed plants,among them,the tropical floristic elements are absolute predominance and there is less endemic elements of the area; ④In the area, the medicinal resource are very abundant ,and the flora was ancient origined and fragile.