Campylopus clavatus

Dioicous. Green to dark green. Stems 2.5–6 cm long, uniformly foliate when sterile, ±comose when fertile, brown, with red-brown rhizoids toward base. Leaves erecto-patent to patent an often homomallously curved when moist, appressed to erect and frequently homomallously curved when dry, narrowly ovate-lanceolate, 4.2–6.6 mm long, 0.5–0.9 mm wide, strongly concave to subtubulose; apex concolorous or ending in a straight hyaline hairpoint to c. 0.9 mm long; costa occupying c. 1/3–1/2 leaf width, percurrent to excurrent; margin entire, plane, with 1–3 rows of more elongate cells not forming a distinct border at the base; laminal cells in apical half irregularly rhomboidal to elliptic, isodiametric to short-linear, 10–60 (–85) μm long, 6–10 (–20) μm wide, not to conspicuously pitted; basal laminal cells rectangular, 25–95 μm long, 5–15 μm wide, hyaline throughout, including above alar region; alar cells mostly well demarcated, inflated, 35–60 μm long, 10–18 μm wide, with dark reddish walls, unistratose. Seta 4–15 mm long, yellow-brown to black, smooth, not twisted. Capsule erect or pendent, ellipsoid to cylindric, 1–2 mm long, straight, yellow-brown. Operculum high-conic, 0.4–0.8 mm long. Peristome Thysanomitrion-type.