Difference between revisions of "Pellaea ternifolia subsp. arizonica"
Contr. Univ. Michigan Herb. 19: 42. 1993.
Treatment appears in FNA Volume 2.
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Latest revision as of 20:21, 5 November 2020
Petiole rounded or slightly flattened adaxially in distal portion; rachis glabrous or with a few widely scattered hairs; pinnae completely glabrous; largest ultimate segments (excluding terminal pinnae) usually more than 18 mm; spores averaging 46–53 µm diam. 2n = 116.
Phenology: Sporulating summer–fall.
Habitat: Cliffs and rocky slopes, on a variety of acidic substrates including quartzite and granite
Elevation: 1700–2400 m
Distribution
Ariz., Tex., n Mexico.
Discussion
Pellaea ternifolia subsp. arizonica and P. wrightiana hybridize; the hybrids are morphologically intermediate tetraploids and have malformed spores.
Selected References
None.
Lower Taxa
None.