7. Claopodium rugulosifolium S.-Y. Zeng 皱叶麻羽藓 zhou-ye ma-yu xian
Acta Bot. Yunnan. 3(2): 263. 1981. Type. China: Xizang, Ding-jie Co., alt. 2800 m, S.-K. Chen 2064b (holotype HKAS).
Plants minute, delicate, yellowish green or brownish green, brown when old, in densely interwoven mats. Stems 1–2-pinnately branched; paraphyllia absent. Leaves rugulose when dry, erect-spreading when moist; stem leaves oblong-rounded to widely ovate, gradually tapering to a lanceolate acumen; leaf margins inconspicuously differentiated, serrate above; costa single, smooth, vanishing near leaf apex; leaf cells rhomboidal to polygonal, unipapillose at the front corner, thin-walled; branch leaves smaller than stem leaves, with short apices. Dioicous? Setae slender, pale reddish brown, smooth; capsules oblong, horizontal or erect-patent; peristome double, well developed; exostome teeth lanceolate, with stripes and lamellae, pale yellowish brown; endostome segments irregularly papillose, with high basal membrane; cilia 2. Calyptrae not seen. Spores not seen.