Leucobryum humillimum Cardot 1901

Plants small to medium-sized, up to 3 cm high, whitish green, in dense compact tufts. Stems erect, simple or branched; central strand present. Leaves crowded, 3–6 mm long, imbricate or straight when dry, erect-spreading when moist, broadly lanceolate to oblong-lanceolate, gradually narrowed to subtubulose apices from ovate to oblong-ovate base, distinctly mucronate to apiculate at the apex, dorsal side of leaf acumina smooth; laminal cells on the upper parts of leaves 1–2 rows of linear cells, near leaf base 4–7 rows of quadrate to rectangular cells with 2–3 rows of linear cells forming a border; in cross section, costal leucocysts in 2–4 layers on abaxial side, 1–2 layers on adaxial side, sandwiched with a layer of chlorocysts. Dioicous. Sporophytes not seen. [According to Yamaguchi (1993), setae 7–10 mm long; capsules inclined, ovoid to ellipsoid, 0.7–1.3 mm long. Other sporophytic features were reported to be the same as described under the genus.]

Distribution: China, Japan, Korea, India, and Sri Lanka.

Habitat: on tree trunks and rocks.

Leucobryum cucullifolium Card. in Ren. & Card., Bull. Soc. Roy. Bot. Belgique 41(1): 30. 1905. Leucobryum cuculliphyllum Fleisch., Musci Fl. Buitenzorg 1: 152. 1904. Leucobryum galeatum Besch., J. Bot. (Desvaux) 12: 286. 1898. Leucobryum neilgherrense C. Müll. var. galeatum (Besch.) Dix., Hong Kong Naturalist. Suppl. 2: 7. 1933. Type. China: Hong Kong, Faurie 15472 (holotype PC; isotype BM). Leucobryum mittenii Besch., J. Bot. (Desvaux) 12: 287. 1989. Leucobryum wichurae Broth. ex Besch., J. Bot. (Desvaux) 12: 288. 1898. Ochrobryum propaguliferum Dix., Notes Roy. Bot. Gard. Edinburgh 19: 281, f. 1. 1938.