Plants slender, with the aspect of P. alpinum var. septentrionale. Stems to 2 cm, leafless below, leafy above. Leaves channeled and incurved when dry, spreading when moist, narrowly triangular, from a broadly elliptic, hyaline-margined sheathing base; marginal lamina serrate to almost entire; lamellae 5-6 cells high, crenate in profile, with each cell crowned by a papillose knob, the marginal cells in section pyriform. [Seta to 1.5 cm, curved. Capsule subspherical; exothecial cells with a distinct thin spot; peristome teeth ca. 40, hyaline, now and then compound.]
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