24. Sphagnum obtusiusculum Lindb. ex Warnst. 秃叶泥炭藓 tu-ye ni-tan xian
Hedwigia 29: 196. 1890. Type. South Africa.
Plants medium- to large-sized, generally slender, to 12 cm high, grayish, tinged with pink when wet, yellowish when dry, in loose tufts. Stem cortex in 2–3 layers, hyaline cells large, thin-walled, without fibrils; central cylinder yellowish or pale pinkish. Stem leaves 1.1–1.4 mm × 0.6–0.7 mm, short ligulate, slightly narrowed and rounded, irregularly dentate at the apex; borders narrow above, somewhat widened below; hyaline cells rhomboidal, mostly divided, without fibrils, or rarely with fibrils and pores in the upper leaf. Branches in fascicles of 4, with 2 spreading and 2 pendent, slender. Branch leaves 1.0–1.5 mm × 0.4–0.5 mm, imbricate, erect at the tips, oblong-ovate to lanceolate with rather narrowed acumen, margins involute in the upper half; hyaline cells narrowly rhomboidal, irregularly fibrillose and with half-elliptic pores at the opposite ends on the dorsal surface, with numerous large, central pores on the ventral surface; green cells in cross section triangular or trapezoidal, exposed more broadly on the ventral surface, slightly exposed or enclosed by hyaline cells on the dorsal surface. Dioicous. Sporophytes not seen.