Difference between revisions of "Pellaea glabella subsp. simplex"
Taxon 26: 325. 1977.
IllustratedEndemic
Basionym: Pellaea glabella var. simplex Butters Amer. Fern J. 7: 84. 1917
Synonyms: Pellaea atropurpurea var. simplex (Butters) C. V. Morton Pellaea occidentalis subsp. simplex (Butters) Gastony Pellaea suksdorfiana
Treatment appears in FNA Volume 2.
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Latest revision as of 20:24, 5 November 2020
Ultimate segments essentially glabrous; sporangia containing 32 spores; spores averaging 60–72 µm diam. n = 2n = 116, apogamous.
Phenology: Sporulating summer–fall.
Habitat: Calcareous cliffs and ledges, usually on limestone
Elevation: 900–3000 m
Distribution
Alta., B.C., Ariz., Colo., Idaho, Mont., N.Mex., Utah, Wash., Wyo.
Discussion
This western counterpart of Pellaea glabella subsp. glabella is an apogamous tetraploid. A. F. Tryon (1957) and D. B. Lellinger (1985) hypothesized that it might have arisen as a hybrid between the western diploid member of the P. glabella complex (here called subsp. occidentalis) and P. atropurpurea. G. J. Gastony (1988) has shown conclusively, however, that P. glabella subsp. simplex is an autopolyploid derivative of subsp. occidentalis and does not contain genes contributed by P. atropurpurea.
Selected References
None.
Lower Taxa
None.