Protonematal flaps narrow, linear, acute up to 2.5 mm, usually entire, sometimes with a short mucronate point. Stem leaves acuminate, sharply pointed.
Capsules rare to very rare, mature late summer. Often growing inverted under rock ledges or in crevices, especially in areas of high humidity, sometimes mixed in with other bryophytes; low to high elevations; N.B., Nfld. and Labr. (Nfld.); Mich., N.Y., Ohio, Wash.; Europe; Asia (Japan); Pacific Islands (New Zealand).
Plants: without flagelliform shoots. Thallose protonematal flaps narrowly linear-lanceolate acute, occasionally with a short mucronate point, margins usually entire, up to 2.5 mm. Leaves: with costa weak or sometimes absent, present only in distal leaves. Spores: about 10–12 µm. North America, Eurasia.