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FNA | Family List | FNA Vol. 28 | Mielichhoferiaceae | Pohlia

28. Pohlia columbica (Kindberg) A. L. Andrews in A. J. Grout, Moss Fl. N. Amer. 2: 202. 1935.

Webera columbica Kindberg in J. Macoun and N. C. Kindberg, Cat. Canad. Pl., Musci, 115. 1892

Plants small to medium-sized, green to reddish, dull. Stems0.4-1.5 cm, . Leaves erect-spreading to spreading, narrowly lanceolate to lanceolate, 1.2-2.5 mm; ; margins serrate in distal 1/3; costa subpercurrent; distal medial laminal cells linear-hexagonal, 85-150 µm, walls thin. Specialized asexual reproduction absent. Sexual condition dioicous; perigonial leaves ; perichaetial leaves ± differentiated, lanceolate to linear-lanceolate. Seta orange-brown. Capsule inclined 145-180°, brown to stramineous, short-pyriform to urceolate, neck less than 1/3 urn length; exothecial cells isodiametric, walls sinuate; stomata immersed; annulus absent; operculum short- to long-conic; exostome teeth yellow to yellow-brown, triangular-acute; endostome hyaline, basal membrane 1/2 exostome length or slightly longer, segments , distinctly keeled, broadly perforate, cilia long and nodulose, or short. Spores 13-18 µm, finely roughened.

Capsules mature spring (May-Jul). Disturbed soil, along streams; low elevations; B.C.; Alaska, Wash.

Pohlia columbica is a very rare and poorly known species characterized by dull reddish plants, variably long-acuminate perigonial leaves, pale yellow-brown exostome teeth, and immersed stomata. The exothecial cell walls of capsules of this species are somewhat collenchymatous; the perichaetial leaves are 3 mm long.


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