20. Pohlia bulbifera (Warnstorf) Warnstorf in C. F. Warnstorf et al., Krypt.-Fl. Brandenburg. 1: 429. 1904.
Webera bulbifera Warnstorf, Bot. Centralbl. 66: 230. 1896
Plants small to medium-sized, green, glossy. Stems 0.3-3 cm. Leaves ± erect, lanceolate, 0.9-1.4 mm; margins serrulate reproduction usually present when sterile; axillary gemmae 2-6, spheroid to obovate, , yellow, orange, or green, leaf primordia restricted to apex and forming dome, laminate. Sexual condition dioicous; perigonial leaves ovate; perichaetial leaves scarcely differentiated, 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, gravelly or sandy disturbed soil, path banks, stream banks, peaty soil; low to high elevations; Greenland; B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., Que.; Alaska, Colo., Maine, Mass., Mich., N.H., N.Y., Vt., Wash., Wis.; Eurasia.
The gemmae of Pohlia bulbifera appear to be round to oblong because the four or five laminate leaf primordia are concave and form a dome over the gemma apex. The leaves are wide-spreading so the gemmae, although small, can be seen clustered in the distal leaf axils. This species sometimes occurs on peaty soils in bogs but also occurs on gravelly soils in disturbed places.