中文摘要：

首次报道中国分布的3种瓦韦属植物的染色体数目,分别为线叶瓦韦,2n=42;丽江瓦韦,2n=144;西藏瓦韦,2n=50。其中,线叶瓦韦n=21是水龙骨科一个新的染色体基数。结合已有资料对染色体数目在瓦韦属中的重要分类学价值进行了讨论。

英文摘要：

In the present paper,the chromosome numbers of three species of Lepisorus were reported for the first time.The chromosome number was 2n=42 in Lepisorus lineariformis;2n=144 in L.likiangensis;2n=50 in L.tibeticus.The haploid chromosome number n=21 is a newly reported number in Polypodiaceae.Based on our study and previous data,we discussed the systematic significance of variability of chromosome numbers within the genus.