Hennediella polyseta (Müll. Hal.) R.H. Zander
Plants small to medium sized, forming dense turfs, yellowish green to dark-green or brownish. Stems (0.2)0.4-1.7 cm high, usually branched. Leaves erect-patent to individually twisted, or crispate when dry, erect-patent to patent, more rarely spreading when wet, lanceolate to ovate-lanceolate, more rarely oblong-lanceolate or oblong-ovate, (2.2)3.4-5(5.4) mm long, 0.6-0.8(1.1) mm wide, apex usually acute, rarely acuminate; margins plane, dentate by (8)16-52(58) teeth per margin, unistratose, occasionally irregularly bistratose; costa percurrent or ending 1-3 cells below the apex; in cross-section elliptic, more rarely semicircular, with (4)6-9 guide cells, in (1)2(3) layers, and (3)4-5(7) rows of dorsal stereids, rarely with 1-2 rows of ventral stereids; upper and median cells quadrate to short-rectangular, sometimes rhomboidal, (12.5)15-20(35) mm long, 10-15 μm wide, papillose; marginal cells forming a border, (5)6-9(11) rows of linear cells at midleaf, (25)31-45(53) µm long, 2.5(5) μm wide [ratio length/width (5)12-18(21)]. Autoicous. Setae (7)12-18(27) mm long. Capsules exserted, urn cylindrical, (2.8)3.5-4.5(5.1) mm long; opercula rostrate, 1.7-2.4 mm long, not systylius, in straight rows; peristome absent or with a vestigial basal membrane. Spores (17.5)20-22.5(25) μm in diameter.
Ecology. Humid, semi-humid and dry puna; on soil, usually in boggy places (bofedales). Elevation. 3400-4780 m. Distribution. Bolivia: Cochabamba, La Paz, Oruro. World range: Mexico, and in the tropical Andes known from Colombia to Bolivia and northwest Argentina.
Hennediella polyseta is characterized by lanceolate to ovate lanceolate leaves, percurrent or subpercurrent costa, unistratose and strongly dentate leaf margins and elliptic transverse section of the costa.
Specimens. Cochabamba: Cano et al. 3877 (LPB, MUB); La Paz: Lewis 87-312 (LPB, MO).