8. Pogonatum japonicumSull. & Lesq. 东北小金发藓 dong bei xiao jin fa xian
Proc. Amer. Acad. Arts Sci. 4: 278. 1859. Type: Japan. Mts. of Hakodaki, Wright s.n.
Pogonatum grandifolium (Lindb.) Jaeg., Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1873–74: 253. 1875. Polytrichum grandifolium Lindb., Acta Soc. Sci. Fenn. 10: 264. 1872.
Pogonatum grandifolium var. tosanum Card., Bull. Soc. Bot. Genève, ser. 2, 1: 130. 1909.
Plants robust, dark green, brownish green when old, in loose tufts. Stems usually 8–10 cm long, rarely more than 10 cm, not branched or rarely branched above. Basal leaves small; upper leaves often crisped or twisted when dry, erect patent when moist, oblong-ovate and amplexicaulous at base, suddenly constricted above to a oblong-lanceolate limb; leaf margins bistratose, grossly sharp-toothed above, each tooth with one large, yellowish brown apical cell and 5–6 irregularly small cells; the back of costae mostly with gross spines at apex; lamellae in ca. 60 ranks, densely arranged on ventral surface of leaves, 3–6 cells high, apical cells of lamellae usually in pairs, oblong or oblong-oval in cross section, densely papillose, 8–12 µm in diameter. Dioicous. Setae about 2 cm long; capsules oblong ovoid or short cylindrical, ca. 5 mm long; exothecial cell walls mammillose; opercula conical; peristome teeth 64, reddish brown, obtuse at apex. Spores 8–12 µm in diameter.