Homaliodendron maolanense sp. nov. (Neckeraceae, Bryophyta), a new species from China based on molecular and morphological data

The new species Homaliodendron maolanense sp. nov. is described and illustrated based on its morphological and molecular evidence. The new species can be distinguished from all congeners by the combination of the following features: 1) plants strongly flattened and frondose; 2) secondary stems with bi- to tripinnate branches and a few foliose pseudoparaphyllia; 3) stem leaves rather asymmetric, strongly falcate, ovate-spathulate, widest at the middle, strongly tapered to base, with a truncate or apiculate apex, as well as double and distinct costae; 4) margins of stem leaves irregularly biserrate with 6-12 sharp teeth, the terminal tooth curved, larger than the others, multicellular, coarse and blunt, entire below; and 5) cells of stem leaves strongly incrassate and smooth, strongly porose at low and basal portions. A key and digital image are presented to separate H. maolanense sp. nov. from other nine Chinese species.