genus Pseudocyclosorus Ching (Thelypteridaceae)

The genus is described and its history discussed; some differences from Ching's original statement on the genus are indicated, and species from Africa are added to his list. A key to all known species is provided, with synonymy and description for each, including the following which are new: Pseudocyclosorus gamblei and P. ornatipes. The new combination P. canus (Baker) Holttum & Grimes is published, with a discussion of its involved synonymy. New information on chromosome numbers is included. The name Nephrodium multijugum Baker, placed as a synonym of Dryopteris ochthodes (Kunze) Kuntze by Christensen in his Index Filicum, is excluded.