7. Ctenidium malacobolum (C. Müll.) Broth. 麻齿梳藓 ma chi shu xian
Nat. Pflanzenfam. I(3): 1048. 1908. Microthamnium malacobolum (C. Müll.) Jaeg., Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1876–77: 431. 1878. Hypnum malacobolum C. Müll., Syn. Musc. Frond. 2: 689. 1851. Type: Indonesia. West Java, Fleischer s.n.
Ctenidium malacobolum var. robustum Fleisch., Musci Buitenzorg 4: 1460. 1923.
Ctenidium moluccens Herz., Hedwigia 61: 291. 1919.
Plants medium-sized to large, pale yellowish green. Stems prostrate, ca. 5 cm long, pinnately or subpinnately branched, branches remote, flattened, curved, ca. 1.5 cm long; pseudoparaphyllia ovate to triangular, shortly to long-acuminate. Stem leaves spreading, curled or rugose, falcate-secund, 1.4–1.8 mm × 0.6–0.8 mm, broadly ovate- or ovate-lanceolate, slenderly acuminate, curved, often twisted at apex, cordate at base, long-decurrent, rarely plicate; margins recurved above, rugose, serrulate to serrate throughout; costae double, ca. 1/4 the leaf length, often separate at base; median leaf cells 50–80 µm × 4–5 µm, slightly prorate, thick- walled; alar cells shortly rectangular or oval, rarely rhombic, thick-walled, excavate cells distinctly differentiated, rectangular; branch leaves spreading, slightly falcate-secund, 1.0–1.4 mm × 0.3–0.5 mm, narrowly ovate-lanceolate, serrulate at margins. Dioicous. Inner perichaetial leaves erect, reflexed above, ovate- or triangular-lanceolate, sometimes plicate, slenderly acuminate; serrulate at upper margins, costae 1 or forked or 2, ca. 1/2 the leaf length, median cells thick-walled, porose. Setae ca. 2.5 cm long, reddish brown, smooth; capsules horizontal, ovoid, ca. 2 mm × 1 mm, slightly curved; opercula shortly rostrate. Spores 15–18 µm in diameter.