1. Amphidium lapponicum (Hedw.) Schimp. 瓶藓 ping xian
Coroll. Bryol. Eur., p. 39. 1856. Anictangium lapponicum Hedw., Sp. Musc. Frond., p. 40. 1801. Type. Finland.
Amphidium sublapponicum (C. Müll.) Broth., Nat. Pflanzenfam. 1(3): 460. 1902. Zygodon sublapponicus C. Müll., Nuov. Giorn. Bot. Ital. n. sér. 5: 186. 1898. Type. China: Shaanxi, Taibai Shan (Mt.), Giraldi 1209 (holotype H). Synonymized by C. Gao (1994).
Plants small to medium-sized, up to 3.5 cm high, dark green or yellowish brown, in dense tufts. Stems erect, simple or forked, radiculose below. Leaves strongly curled and contorted when dry, narrowly oblong- to linear-lanceolate; margins irregularly and narrowly recurved below, entire or indistinctly sinuate above; costa single, strong, ending near the leaf apex, papillose on both sides; upper laminal cells rounded-hexagonal, 8–10 µm in diameter, thick-walled, very opaque, densely warty-papillose; lower cells slightly larger, rectangular, thin-walled, hyaline or pale yellowish, smooth; alar cells not differentiated. Autoicous. Perichaetial leaves greatly enlarged, entirely sheathing, broad at base, short-pointed at the apex. Setae up to 2 mm long, as long as or shorter than perichaetial leaves; capsules shortly emergent, 1.0–1.3 mm long. Spores 9–12 µm in diameter, usually smooth or nearly so.