Webera proligera Kindberg, Forh. Vidensk.-Selsk. Kristiania 1888(6): 30. 1888

Plants medium-sized, green, glossy. Stems 0.5-3.5 cm. Leaves ± erect, lanceolate, 0.6-1.6 mm; margins serrulate to serrate in distal 1/3; costa subpercurrent; distal medial laminal cells rhombic to linear-rhomboidal, 60-105 µm, walls thin. Specialized asexual reproduction usually present when sterile; axillary gemmae in dense clusters, oblong-linear to linear-vermicular, white, pale green, or rarely pale orange, hyaline, leaf primordia restricted to apex, , peglike, . Sexual condition dioicous; perigonial leaves ovate; perichaetial leaves weakly differentiated, narrowly lanceolate. Seta orange-brown. Capsule inclined 95-180°, brown to stramineous, pyriform, neck 1/3 urn length; exothecial cells short-rectangular, walls sinuate; stomata superficial; annulus present; operculum convex-conic; exostome teeth yellow-brown, narrowly triangular-acute; endostome hyaline, basal membrane 1/2 exostome length, segments distinctly keeled, broadly perforate, cilia short to rudimentary. Spores 16-21 µm, finely roughened.

Capsules mature summer (Jun-Aug). Acid, sandy disturbed soil, path banks, stream banks; low to high elevations; Greenland; Alta., B.C., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que.; Alaska, Ariz., Calif., Colo., Idaho, Maine, Mich., Minn., Mont., N.Y., Oreg., S.Dak., Utah, Vt., Wash.; Europe.

Pohlia proligera is a relatively common species in boreal and high-montane habitats. The leaves are glossy, with dense, feltlike clusters of whitish, pale green, or sometimes pale orange gemmae in their axils. The gemmae are linear-vermicular with one or two peglike apical leaf primordia.