Study on the Fern Genus Polystichum Roth Sect. Lasiopolystichum Daigobo from China
中国耳蕨属高山耳蕨组的分类学研究

The members of Polystichum Roth sect. Lasiopolystichum Daigobo are familiar ferns in the alpine area of W. China, N. India and the Himalayas. They are deciduous with thin, weak leaves; their persistent base of petioles forms a clumb hiding and protecting buds from the frost in winter. This may be an adaptation to severe alpine environments. As an en- demic and natural group, the treatment of it by S. Daigobo(1972) as an independent sec- tion, Polystichum sect. Lasiopolystichum is reasonable. On the basis of examination of the specimens of mainland China, 30 species are recognized under this section although S. Daigobo(1972) established this section with only three species included. Based on the mi- croseales on the lower surface of pinnae, the section is divided into 2 series: Ser. Moupinen- sia and Ser. Sinensia. Moreover, three new species, two new varieties and a new combina- tion are reported: P. rufopaleaceum, P. saxicola, P. kangdingense, P. sinese var. lo-batum , P. mollissium var. laciniatum , and P. integrilobum .