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FNA | Family List | FNA Vol. 2 | Pteridaceae | Pellaea

12c. Pellaea glabella subsp. missouriensis (G. J. Gastony) Windham, Contr. Univ. Michigan Herb. 19: 39. 1993.

Pellaea glabella var. missouriensis Gastony, Amer. Fern J. 78: 64. 1988

Some ultimate segments (especially terminal segments) with hairlike scales abaxially near midrib; sporangia containing 64 spores; spores averaging 38--52 ┬Ám diam. 2 n = 58.

Sporulating summer--fall. Cliffs and ledges, apparently confined to limestone; 100--300 m; Mo.

This diploid taxon is currently known only from southeastern Missouri in the Ozark region, but a thorough survey of spore number per sporangium in Pellaea glabella from eastern North America may yield additional localities. Plants of P . glabella subsp. missouriensis occasionally hybridize with P . glabella subsp. glabella ; the hybrids are apogamous pentaploids resembling P . glabella subsp. glabella (G. J. Gastony 1988).


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