Philonotis falcata (Hook.) Mitt.

Plants small to medium-sized, caespitose, green to yellow-green, brownish below; terrico lous or saxicolous. Stems 20-50(-80) mm high, branching by subperichaetial innovation, tomentose below, red-brown; in section round, central strand large, inner cortical cells in 2-3 rows, large, thin-walled, ± thickened toward outside, outer cortical cells in 2 rows, incrassate or substereids, yellow-brown, epidermal cells large, thin-walled, ± inflated, fragile. Leaves widespreading to squarrose, ± contorted dry or rarely incurved, widespreading wet, keeled; ovate-acuminate, (1.0-)1.2-1.5 mm long; margins plane, serrate above. Costa short-excurrent, ventral and dorsal superficial cells long-rectangular, prorate; in section bulging dorsally, guide cells 3-4, incrassate, ventral stereid or substereid band weak, occasionally absent, ventral surface cells incrassate, dorsal stereid band stronger, 2-4 cells thick, cells occasionally substereids, frequently with distinct gap below central guide cells, dorsal surface cells incrassate. Laminal cells rectangular, 1.5-3.0:1, generally weakly thickened, prorate ventrally at distal or proximal ends; basal cells rectangular, ± bulging, prorate except at insertion. Dioicous. Perigonia terminal; leaves broadly oval, abruptly narrow-acuminate. Perichaetia terminal, overgrown by numerous subperichaetial innovations; leaves oval to oblong, abruptly narrow-acuminate, to 2 mm long. Seta 25-35 mm long, red-yellow; capsule inclined to suberect, urn globose to ovoid, 2.5 mm long, weakly striate dry, red-yellow; exothecial cells hexagonal to rhomboidal or angular, thickened, 6 rows at capsule mouth transversely rectangular, reddish; stomata present at base of urn, phaneropore; peristome double, exostome teeth 16, narrowly triangular, fragile, finely papillose, endostome with segments alternating with teeth, perforated, cilia 2-3, ornately papillose; operculum not seen; spores subround, 27-30 µm, papillose, brownish.