Polytrichastrum alpinum var. septentrionale

(Bridel) G. L. Smith

Mem. N.Y. Bot. Gard. 21(3): 37. 1971,.

Basionym: Polytrichum septentrionale Hedwig J. Bot. (Schrader) 1800(1): 285. 1801
Synonyms: Pogonatum alpinum var. septentrionale (Bridel) Bridel Polytrichum alpinum var. septentrionale (Bridel) Lindberg Polytrichum norwegicum
Treatment appears in FNA Volume 27. Treatment on page 127. Mentioned on page 126, 128, 129.

Stems to 2 cm, slender and wiry, in dense tufts. Leaves densely imbricate, not fragile, channeled and incurved when dry, scarcely spreading when moist; not constricted at junction of sheath and blade, the blade persistent, sheath broadly elliptic; marginal lamina typically entire, or finely and remotely serrate toward the tip. Capsule small and subglobose.


Habitat: Soil
Elevation: moderate to high elevations

Distribution

V27 150-distribution-map.gif

Alta., Man., Nfld. and Labr. (Labr.), N.W.T., N.S., Nunavut, Que., Calif., Colo., Mont., Utah, Wash., Wyo., Europe, n Asia.

Discussion

Variety septentrionale is an arctic-alpine taxon. In arctic North America there is a correlation between capsule shape and leaf serration, plants with distinctly serrate leaves having ovoid-cylindric or cylindric capsules, whilst those with entire or subentire margins have subglobose or ovoid capsules (D. G. Long 1985).

Selected References

None.

Lower Taxa

None.
Gary L. Smith Merrill +
(Bridel) G. L. Smith +
Polytrichum septentrionale +
Alta. +, Man. +, Nfld. and Labr. (Labr.) +, N.W.T. +, N.S. +, Nunavut +, Que. +, Calif. +, Colo. +, Mont. +, Utah +, Wash. +, Wyo. +, Europe +  and n Asia. +
moderate to high elevations +
Mem. N.Y. Bot. Gard. +
Pogonatum alpinum var. septentrionale +, Polytrichum alpinum var. septentrionale +  and Polytrichum norwegicum +
Polytrichastrum alpinum var. septentrionale +
Polytrichastrum alpinum +
variety +