14. Hypnum recurvatum (Lindb. & Arn.) Kindb. 多毛灰藓 duo mao hui xian
Enum. Bryin. Exot., Suppl. 2, 100. 1891. Hypnum bridelianum var recurvatum (Lindb. & Arn.) Nyholm, Moss Fl. Fennoscandia. II. Musci 776. 1969. Drepanium recurvatum (Lindb. & Arn.) Roth, Eur. Laubm. 2: 613. Pl. 55, f. 24. 1905. Stereodon recurvatus Lindb. & Arn., Kongl. Svenska Vetenskapsakad. Handl. 23(10): 149. 1890. Type: Russia. Siberia, Arnell s.n.
Hypnum bridelianum Crum, Steere & Anderson, Bryologist 68: 433. 1965.
Plants slender, small, pale green, yellowish or yellowish brown, in dense patches. Stems creeping, rarely erect, 2.0–5.0 cm long, somewhat regularly pinnately branched; numerous rhizoids at base; in stem cross section central strand somewhat developed; pseudoparaphyllia foliose or linear-lanceolate, rarely branched. Stem leaves 0.7–1.3 mm × 0.30–0.45 mm, ovate-lanceolate or oblong-lanceolate, falcate-secund, concave, slenderly acuminate, slightly decurrent at base; margins plane or recurved below, sometimes up to 2/3 the leaf length, subentire or serrulate; costae double, weak or absent; median and upper leaf cells linear, 30–60 µm long, thick-walled, basal cells shorter, sometimes porose; alar cells subquadrate, thin-walled, with 4–10 cells extending along the margin; branch leaves smaller, 0.5–1.0 mm × 0.20–0.35 mm. Autoicous. Inner perichaetial leaves erect, oblong-lanceolate, subentire, plicate, costae indistinct. Setae elongate, 7–15 mm long, yellowish brown or reddish brown, twisted when dry; capsules erect or slightly inclined, ellipsoid or oblong-ovoid, 1.0–2.0 mm long, constricted below the mouth when dry; opercula conic, minutely papillose; peristome perfect hypnoid, with 2–3 cilia, rarely 1 cilium. Calyptrae not seen. Spores not seen.