Difference between revisions of "Polytrichastrum alpinum var. septentrionale"
Mem. N.Y. Bot. Gard. 21(3): 37. 1971,.
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Revision as of 22:30, 27 May 2020
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
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.