Plants without flagelliform shoots. Thallose protonematal flaps narrowly linear-lanceolate acute, occasionally with a short mucro-nate 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.
Varieties 2 (2 in the flora): North America, Eurasia.
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).