A study of Drepanolejeunea subg. Rhaphidolejeunea (Herzog) Grolle and R.L. Zhu, stat. nov. (Hepaticae, Lejeuneaceae) in China with notes on its species elsewhere

Rhaphidolejeunea Herzog is reduced to a subgenus of Drepanolejeunea (Spruce) Schiffn. In China the subgenus comprises six species: D. commutata Grolle and R.L. Zhu (sp. nov.). D. cyclops (Sande Lac.) Grolle and R.L. Zhu (comb. nov.), D. cf. fleischeri (Steph.) Grolle and R.L. Zhu (comb. nov.), D. foliicola Horik., D. spicata (Steph.) Grolle and R.L. Zhu (comb. nov.), and D. yunnanensis (P.C. Chen) Grolle and R.L. Zhu (comb. nov.). An epitype is designated for clarifying the meaning of the latter one. Drepanolejeunea commutata is similar to D. yunnanensis in male bracteoles present throughout the androecium, but differs in its free lateral margin of the leaf lobule bordered by four strongly elongate rectangular cells. D. cyclops is excluded from the Chinese bryoflora. Detailed descriptions and illustrations of the Chinese species and a key to the species known worldwide are presented. Further five new combinations are proposed: Drepanolejeunea bischlerae (Grolle) Grolle and R.L. Zhu, D. cyclops (Sande Lac.) Grolle and R.L. Zhu, D. longicruris (Steph.) Grolle and R.L. Zhu, D. polyrhiza (Nees) Grolle and R.L. Zhu, and D. siamensis (Bischl.) Grolle and R.L. Zhu.