Abstract

Diagnoses are given for Fissidens gardneri Mitt. (syn.: F. brevinervis Broth., F. fouta- djalloni Par., and F. microcladus Thwaites & Mitt. in Mitt.) and F. minutus Thwaites & Mitt. in Mitt. (syn.: F. chungii ThOr., F. garberi Lesq. & James, and F. rizalensis Bartr.). Fissidens gardneri and F. minutus are examples of species with broad distribution in the neotropics, Asia, and Africa. Section Semilimbidium C. Mill. of subgenus Fis- sidens includes some of the most taxonomically dif- ficult species in the genus Fissidens Hedw. Although a plethora of names exists for the myriad expres- sions encountered in this principally tropical taxon, associating the correct name with the proper mor- phological expression has often been problematic. Four names, representing two closely related but distinct species, that have caused confusion are F. gardneri Mitt. and F. garberi Lesq. & James, and F. minutus Thwaites & Mitt. in Mitt. and F. mi- crocladus Thwaites & Mitt. in Mitt. In this paper diagnoses of F. gardneri and F. mi- nutus are given, and our understanding of the no- menclature, previous application of names, and dis- tribution of the species is presented. Both F. gardneri and F. minutus are further examples of species dis- tributed in the neotropics, Asia, and Africa (Pursell et al. 1992). Geographical regions given are accord- ing to Hollis and Brummitt (1992).

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