1. Gollania arisanensisSak. 阿里粗枝藓 a li cu zhi xian
Bot. Mag. (Tokyo) 46: 507. 1932. Type: China. Taiwan, Mt. Arisan, Suzuki s.n.
Plants slender, pale yellowish green or pale brownish green, glossy. Stems prostrate, up to 3 cm long, irregularly or pinnately branched; stem elliptic in cross section; leafy stems nearly terete or flattened, somewhat secund; branches nearly terete, ca. 1.0 cm long; pseudoparaphyllia lanceolate, 4–6 cells wide at base. Stem leaves differentiated; dorsal leaves slightly falcate-secund and concave, lanceolate, 1.8–2.0 mm × 0.3–0.4 mm, broader in the middle, gradually and slenderly acuminate, shortly decurrent; margins recurved from base to near apex, serrulate above; costae double, reaching up to 1/4 the leaf length, usually separate at base; median leaf cells linear, 50–70 µm × 3–4 µm, thin-walled, smooth; alar cells slightly differentiated, in 4–6 longitudinal rows, 3–4 transverse rows; ventral leaves somewhat rugose at apex; branch leaves smaller, 1.3–1.5 mm × 0.2–0.3 mm. Inner perichaetial leaves reflexed at apex, costae double or indistinct, cells thick-walled, porose. Setae 1.0–1.3 cm long, yellowish brown, often twisted when dry; capsules cylindrical, horizontal, with short necks, smooth; peristome double, hypnoid. Spores yellowish green, spherical, 20–24 µm in diameter, minutely papillose.