3b. Polytrichastrum formosum var. densifolium (Wils. ex Mitt.) Iwats. & Nog. 大拟金发藓圆齿变种 da ni jin fa xian yuan chi bian zhong
J. Hattori Bot. Lab. 37: 389. 1973. Polytrichum formosum Hedw. var. densifolium (Wils. ex Mitt.) Osada in Osada & K. Yano, J. Jap. Bot. 10: 80. 1966. Polytrichum densifolium Wils. ex Mitt., J. Proc. Linn. Soc., Bot., Suppl. 2: 155. 1859. Type: India.
Plants medium-sized to large, usually 3–10 cm high. Stems erect, simple. Leaves erect when dry, erect-spreading or slightly curved when moist; basal leaves scale-like; middle and upper leaves crowded; upper leaves 4–8(–10) mm × ca. 1.5 mm, lanceolate above, shortly sheathing at base, ca. 2.0 mm wide, sometimes piliform at apex; ventral lamellae in 50–80 rows, 3–6 cells high, apical cells of lamellae arching, almost as wide as the lower cells, thin-walled, crenulate; leaf margins sharply serrate; costa broad, often spinose at back near apex; median leaf cells rounded ovate to rounded quadrate, 8.5–14 µm wide, sometimes oblate; cells of sheathing base narrowly rectangular, 40–90 µm × 7–12 µm. Autoicous, rarely dioicous. Setae erect, reddish yellow or reddish brown; capsules with 4–6 obtuse keels, 4–6 mm × 2–3 mm, exserted, apophyses indistinct; opercula with long beaks; annuli differentiated, deciduous; peristome teeth 64, 50–90 µm long; membrane thin. Calyptrae cucullate, densely covered with golden hairs. Spores spherical, 10–14 µm in diameter, verrucose.