Pohlia columbica

(Kindberg) A. L. Andrews in A. J. Grout

in A. J. Grout, Moss Fl. N. Amer. 2: 202. 1935. 1935

EndemicIllustrated
Basionyms: Webera columbica Kindberg in J. Macoun and N. C. Kindberg, Cat. Canad. Pl., Musci, 115. 1892
Treatment appears in FNA Volume 28. Treatment on page 209. Mentioned on page 196.

Plants small to medium-sized, green to reddish, dull. Stems 0.4–1.5 cm, green to pale orange or pink. Leaves erect-spreading to spreading, narrowly lanceolate to lanceolate, 1.2–2.5 mm; base not or scarcely decurrent; 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 to 3 mm; 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 tapered apically, distinctly keeled, broadly perforate, cilia long and nodulose, or short. Spores 13–18 µm, finely roughened.


Phenology: Capsules mature spring (May–Jul).
Habitat: Disturbed soil, along streams
Elevation: low elevations

Discussion

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.

Selected References

None.

Lower Taxa

None.