16. Bryum cyclophyllum (Schwaegr.) Bruch & Schimp. 圆叶真藓 yuan ye zhen xian
Bryol. Eur. 4: 133. 1839. Mnium cyclophyllum Schwaegr., Sp. Musc. Frond., Suppl. 2, 2(2): 160. pl. 194. 1827. Type: Germany. Bavaria.
Bryum tortifolium Brid., Bryol. Univ. 1: 844. 1827.
Plants soft, medium-sized, ca. 20 mm, rarely to 40 mm high, grayish to yellowish green or brownish, in loose tufts. Stems simple or branched. Leaves flexuous, sparse, twisted when dry, erect-spreading when moist, ca. 2.0–2.2 mm long, oblong-ovate to rounded-ovate or elliptical, obtuse at apex, narrowed, not decurrent at base; margins plane, entire, bordered by several rows of narrower cells; costae ending below the apex; upper leaf cells oblong-rhombic, 25–59 µm × 13–24 µm, thin-walled. Dioicous. Setae to 15 mm long; capsules pendulous, oblong-obovoid; exostome teeth yellowish below, hyaline above; endostome segments widely perforate; basal membrane ca. 1/2 the height of teeth; cilia 2–3, almost as long as the segments, appendiculate. Spores 12–15 µm in diameter.