Moss Fl. Pacif. N.W., 245. 1971. 1971
Plants (4–)6–8(–10.5) cm. Secondary stem leaves 2–3.2 × 1–1.7 mm. Branch leaves oblong-ovate to ovate, 1–2.2 × 0.5–0.8 mm; margins serrate at apex; apex obtuse to broadly acute; basal laminal cells 5–8 × 1–2 µm; medial juxtacostal cells long-rhomboidal, longest axis parallel to costa, 3–5 × 1–3 µm; apical cells subquadrate to short-rhomboidal, 2–4 × 1–2 µm. Sexual condition dioicous.
Habitat: Rock, humus, base of trees, shaded banks, boulders, cliffs
Elevation: moderate elevations
B.C., Alaska, Calif., Conn., Idaho, Mont., N.Y., N.C., Ohio, Oreg., Pa., Wash., Europe (Czech Republic, Germany, Italy), Asia.
Thamnobryum neckeroides is distinguished by the distinctly concave, almost boat-shaped branch leaves, and the rounded to broadly rounded apex. The apical laminal cells are mostly subquadrate to short-rhomboidal and the medial juxtacostal cells have their longest axis parallel to the costa.