Woodsia guizhouensis (Woodsiaceae), a New Species from a Limestone Area in Guizhou, China

A new pteridophyte species. Woodsia guizhouensis P. S. Wang, Q. Luo & Li Bing Zhang (Woodsiaceae), is described and illustrated from higher elevational areas in Guizhou, China. It is morphologically most similar to W. andersonii (Bedd.) Christ and W rosthorniana Die Is. Woodsia guizhouensis is only 3-8 cm tall, its rhizome scales are light brown with sparsely fimbriate margins, its pinnae are short-petiolulate, and its pinna bases are cordate or sometimes rounded. The perispore sculpture of W. guizhouensis pollen is cristate, with numerous acanthoid projections and a few irregular perforations. Woodsia guizhouensis is only known from four localities in western Guizhou and is considered to be Endangered (EN), based on IUCN Red List criteria.