Abstract
Three genera of the moss family Sematophyllaceae are revised for Africa as part of a project looking at the mosses of Seychelles. Two of the three species of the genus Rhaphidostichum Fleisch. (Sematophyllaceae, Bryopsida) prove to belong to different genera (Papillidiopsis (Broth.) Buck & Tan and Acroporium Mitt.). One of the two species of Warburgiella Fleisch. is shown to belong to Trichosteleum All species are described and illustrated. The following two new combinations are made: Papillidiopsis mahensis (Besch.) O’Shea (basionym Rhaphidostegium mahense Besch.) and Acroporium subluxurians (Dix. & Thér.) Tan & O’Shea (basionym Rhaphidostichum subluxurians Dix. & Thér.). Papillidiopsis malayana (Dix.) Tan is made a synonym of P. mahensis, and the basionym of Warburgiella leptorrhyncha is altered to Hypnum leptorrhynchum Müll. Hal., Synopsis 2: 313. 1851.