Distichium capillaceum (Hedw.) B.S.G., Bryol. Eur. 2: 156. 1846. Cynontodium capillaceum Hedw., Sp. Musc. Frond. 57. 1801. Syntypes. Germany, Sweden.
Plants green to yellow-green, 1–6 cm long. Leaves horizontally spreading, oblong-lanceolate, 3–5 mm long; margins erect, hyaline-bordered at base; upper laminal cells small, subquadrate to short rectangular, coarsely papillose; basal cells linear to oblong-linear, hyaline, smooth. Setae 8–20 mm long, red to reddish brown (occasionally yellowish); capsules erect to slightly inclined, cylindrical, 1–2 mm long, brown; peristome teeth lanceolate, split or perforate nearly to the base into 2 nearly equal divisions, papillose-roughened or smooth with oblique striations. Spores rounded, 16–25 µm, papillose.