5. Loeskeobryum Fleisch. ex Broth. 假蔓藓属 jia man xian shu
Nat. Pflanzenfam. (ed. 2), 11: 482. 1925.
Plants large, robust, yellowish green, golden yellow, dull green or brownish green, glossy, in loose tufts. Main stems prostrate to slightly ascending, irregularly 1–2-pinnately branched or regularly bipinnately branched; in cross section a central strand somewhat differentiated, with some small, thin-walled cells, a cortex of parenchyma cells, and a sterome of small, thick-walled cells, the epidermis undifferentiated from the sterome; paraphyllia densely covered on stems, fewer on branches; pseudoparaphyllia not differentiated from paraphyllia; rhizoids sometimes on tips of branches. Stem leaves and branch leaves differentiated; stem leaves spreading or squarrose-recurved, rounded ovate or broadly ovate to broadly cordate, acuminate or abruptly constricted into a slender apex, sometimes curved at apex, not decurrent, concave, slightly plicate or undulate when dry; margins plane, broadly incurved at base, serrate or serrulate above, less sharply toothed below; costae double, less than 1/3 the leaf length, often very short; median leaf cells narrowly rhomboidal to linear, approximately 5–12:1, smooth, walls somewhat incrassate, pitted; basal cells narrowly elongated, golden yellow; alar cells not differentiated; cells of the clasping auricles smaller and rectangular to rhomboidal; branch leaves spreading, rounded ovate to oblong-lanceolate, acuminate to acute at apex, cordate or round at base; margins more strongly toothed than stem leaves, serrate above, serrulate below; costae stronger than those of stem leaves, reaching 1/3–1/2 the leaf length. Dioicous. Perichaetia on main stems. Setae elongate, reddish brown, smooth, twisted; capsules inclined or horizontal, asymmetric, light brown or reddish brown, oblong-ovoid, with a short neck, slightly gibbous, plicate, but not constricted below the mouth when dry; exothecial cells isodiametric or oblong, somewhat incrassate; stomata superficial at the neck; annuli consisting of 1–2 rows of large cells; opercula obliquely rostrate; peristome double; exostome teeth golden yellow, lanceolate, outer surface irregularly cross-striate, papillose, occasionally densely reticulate-papillose; endostome segments as high as the teeth, yellow, papillose, broadly perforated; basal membrane 1/3–1/2 the length of segments; cilia 2–3, nodulose. Calyptrae cucullate, smooth, naked. Spores 10–25 µm in diameter, finely papillose.