16. Sphagnum jensenii H. Lindb. 垂枝泥炭藓 chui-zhi ni-tan xian
Acta Soc. Fauna Fl. Fenn. 18(3): 13. 1899. Type. Russia (formerly Finland).
Plants rather stout, 10–15 cm high, whitish green, capitula often brown, in compact tufts. Stem cortex in 1–2 layers, hyaline cells relatively thick-walled, poorly differentiated from inner cortical layers (4–5 layers) and central cylinder; central cylinder yellowish. Stem leaves 0.8–1.0 mm long, triangular to triangular-ligulate, nearly as long as wide, rounded truncate, dentate at the apex; borders narrow above, slightly widened below; hyaline cells linear-rhomboidal, rarely divided, without fibrils and pores, or rarely with fibrils and pseudopores on both surfaces in the upper cells. Branches in fascicles of 4, with 2 spreading, ca. 1.5–2.0 cm long. Branch leaves 2.2–2.4 mm × 0.5–0.9 mm, imbricate, sometimes secund, narrowly ovate-lanceolate, twice as long as stem leaves, gradually narrowed to a blunt and dentate apex; margins bordered by 2–3 rows of linear cells, entire, involute; hyaline cells linear-rhomboidal, densely fibrillose, with medium-sized, ringed pores on the ventral surface, with small, rounded, unringed pores in commissural rows on the dorsal surface; green cells in cross section triangular, exposed on the dorsal surface, enclosed by convex hyaline cells on the ventral surface. Dioicous; antheridial branches brownish. Perichaetial leaves ovate, broadly bordered. Spores pale yellowish, smooth, ca. 30 µm in diameter.