1. Splachnobryum aquaticum C. Müll. 大短壶藓 da duan hu xian
Linnaea 40: 291. 1876. Type. Somalia: prope Meid, J. M. Hildebrandt 1493.
Splachnobryum giganteum Broth., Symb. Sin. 4: 49. 1929. Type. China: Yunnan, Manhao, Handel-Mazzetti 2981 (holotype H). Synonymized by Arts 2001.
Plants variable in size, small, medium-sized to rather large, up to 7 cm long, usually slender, soft, pale green or yellowish green, in loose tufts. Stems erect, simple or rarely branched, radiculose at base; central strand absent. Leaves sparse below, more crowded above, erect to erect-patent or contorted when dry, spreading when moist, ovate to somewhat oblong-ovate, 1.0–2.5 mm × 0.5–1.2 mm, rounded obtuse at apex; margins plane or narrowly recurved below, entire or minutely crenulate near the apex; costa slender, ending just above the midleaf; upper leaf cells oblong-hexagonal, 30–80 µm × 15–30 µm, lax, thin-walled; marginal cells shorter; lower cells narrowly rectangular. Dioicous. Perigonia terminal, budlike, paraphyses absent. Perichaetial leaves not differentiated. Setae elongate and slender; capsules oblong-ovoid to cylindrical; opercula conic; annuli none; peristome teeth typical as in the genus. Calyptrae large, cucullate. Spores spherical, 15–25 µm in diameter.