4. Taxithelium parvulum (Broth. & Par.) Broth. 短茎麻锦藓 duan jing ma jin xian
Nat. Pflanzenfam. I(3): 1092. 1908. Trichosteleum parvulum Broth. & Par., Bull. Herb. Boissier, ser. 2, 2: 988. 1902. Type: Japan.
Plants small. Stems short, branches 2–3 mm long, ca. 1.3 mm wide with leaves. Stem leaves lanceolate, gradually narrowed into an obtuse apex, concave; margins serrulate above, involute below; branch leaves ovate, gradually constricted into a shortly piliform apex, 1.1–1.3 mm ´ 0.2–0.4 mm, concave; margins serrulate; upper cells each with 3–5 indistinct papillae; median cells 50–70 µm ´ 4–5 mm, thin-walled; alar region not clearly differentiated, but with hyaline, small, quadrate to rectangular, smooth, thin-walled cells, 9–13 mm long. Perichaetial leaves triangular-lanceolate, ca. 1.24 mm × 0.28 mm, ecostate. Setae elongate; capsules cylindrical, ca. 0.88 mm × 0.6 mm; peristome double; exostome teeth and endostome segments nearly equal in length, ca. 250 µm long. Spores small, 11–16 µm in diameter, smooth.