1. Meesia Hedw. 寒藓属 han xian shu
Sp. Musc. Frond. 173. 1801. Meesea Hedw. ex C. Müll., Syn. Musc. Frond. 1: 464. 1848, nom. illeg. Bryum sect. Meesia (Hedw.) Arnott, Mem. Soc. Linn. Paris, 5: 277. 1827.
Diplocomium Web. & Mohr in D. Mohr, Observ. Bot. 33. 1803.
Plants small to large, green or yellowish green above, brownish below, in loose or dense tufts. Stems erect, often branched, with rhizoids at base. Leaves noticeably ranked, 3-ranked, somewhat 3-ranked or more than 3-ranked, crisped when dry, erect or only slightly squarrose when moist, ovate-lanceolate or narrowly lanceolate, blunt or abruptly acute at apex, not or slightly decurrent at base; margins plane or recurved, entire or serrulate; costae broad at base, percurrent or ending below the apex; upper leaf cells quadrate or shortly rectangular, thin-walled, smooth; basal cells rectangular. Dioicous or synoicous. Setae elongate, reddish brown; capsules long-pyriform, slightly curved, inclined or horizontal; opercula conic at base; annuli narrowed, not very well developed; peristome double; exostome teeth very short, blunt at apex; endostome segments narrowly lanceolate, twice as long as the teeth or longer, keeled, perforate; basal membrane low; cilia very short or rudimentary. Spores large, papillose.