中文摘要：

该文报道了铁线蕨属（Adiantum L.）3个种的分布新记录,其中梅山铁线蕨（A.meishanianum）发现于云南西双版纳和普洱,苍山铁线蕨（A.sinicum）发现于云南石屏和四川盐源、屏山、渡口、乐山,孟连铁线蕨（A.menglianense）发现于广西百色和云南西双版纳、楚雄、玉溪。对分布新记录种的地理分布进行了补充,比较了分布新记录种与其近缘种的分类特征,提供了铁线蕨属鞭叶铁线蕨系基于rbcL序列的邻接树（NJ树）,并编制了该系完整的检索表（包括9个种）。

英文摘要：

The new geographical distributions of three species in Adiantum L,A.meishanianum,A.sinicum,and A.menglianense are recorded in this paper.A.meishanianum is found in Xishuanbanna and Puer,Yunnan,A.sinicum in Shiping,Yunnan,and Yanyuan,Pingshan,Dukou and Leshan,Sichuan,and A.menglianense in Baise,Guangxi,and Xishuanbanna,Chuxiong and Yuxi,Yunnan.The diagnostic characters are given between these three species and their respective relatives.Neighbor-joining tree of Ser.Caudata（including eight species,without A.soboliferum） based no rbcL gene is provided.A complete key of Ser.Caudata（including nine species） is also provided.