Difference between revisions of "Pellaea glabella subsp. glabella"
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|genus=Pellaea | |genus=Pellaea | ||
|species=Pellaea glabella | |species=Pellaea glabella | ||
Latest revision as of 21:25, 5 November 2020
Some ultimate segments (especially terminal segments) with hairlike scales abaxially near midrib; most 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 substrates
Elevation: 0–1200 m
Distribution
Ont., Que., Ark., Conn., Ill., Ind., Iowa, Kans., Ky., Md., Mass., Mich., Minn., Mo., Nebr., N.Y., Ohio, Okla., Pa., Tenn., Tex., Vt., Va., W.Va., Wis.
Discussion
G. J. Gastony (1988) has shown that this apogamous tetraploid was derived from Pellaea glabella subsp. missouriensis by an autopolyploid increase in chromosome number.
Selected References
None.
Lower Taxa
None.