7. Haplocladium C. Müll. 小羽藓属 xiao-yu xian shu
Hedwigia 38: 149. 1899.
Bryohaplocladium R. Watan. & Z. Iwats., J. Jap. Bot. 56: 259. 1981.
Plants rather slender to medium-sized, yellowish green, brownish green or light green, in loose interwoven mats or mixed with other mosses. Stems creeping, nearly pinnately or irregularly branched; paraphyllia sparse or numerous, variable in shape; central strand present. Stem leaves and branch leaves somewhat differentiated, revolute or slightly secund when dry, erect-spreading when moist; stem leaves plicate, ovate, toward a lanceolate apex; margins plane or slightly revolute; costa single, percurrent to excurrent; leaf cells irregularly quadrate or rhomboidal, walls equally thickened, unipapillose or projecting at upper ends; branch leaves rather small and narrow. Autoicous. Inner perichaetial leaves oblong-ovate, with a narrow lanceolate apex, pale green. Setae slender, smooth, reddish brown; capsules ovoid to cylindrical, horizontal or inclined, contracted below the mouth, stomata developed; annuli present; opercula conical, shortly beaked; exostome teeth yellowish or yellowish brown; endostome segments well developed; cilia 2–3, nodulose. Calyptrae smooth. Spores medium-sized, papillose.