1. Pelekium bifarium (Bosch & Sande Lac.) Fleisch. 二列鹤嘴藓 er-lie he-zui xian
Musci Buitenzorg 4: 1513. 1923. Thuidium bifarium Bosch & Sande Lac., Bryol. Jav. 2: 123. 1865. Type. Indonesia: Sumatra (isotype BM).
Plants slender, green to yellowish green, brownish at base, in small lax patches. Stems procumbent, up to 5 cm long, regularly bipinnately branched; central strand present; paraphyllia densely covered on stems, usually not on branches. Stem leaves triangularly ovate, concave, acuminate to a piliform apex, appressed when dry, erect-spreading when moist, ca. 0.25 mm × 9 mm; margins entire; costa percurrent, hyaline above, smooth; median leaf cells rhomboidal to oblong, ca. 15 µm × 6 µm, thick-walled, unipapillose; branch leaves arranged in 2 rows, triangular to oblong-ovate at base, acuminate toward apex, ca. 1 mm long; margins serrate; costa slender, reaching 2/5 the leaf length, hyaline, multipapillose. Sporophytes unknown.