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Cells on pinnule margins regular in shape, margins appearing entire; adaxial epidermal cells averaging less than 120 µm. Spores averaging 39–45 µm. 2n = 76.
Phenology: Sporulating summer–fall.
Habitat: Cliffs and rocky slopes, usually on granitic or volcanic substrates
Elevation: 100–2800 m
Distribution
Alta., B.C., Sask., Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.
Discussion
The leaves of Woodsia oregana subsp. oregana tend to be narrower and less glandular than those of subsp. cathcartiana. The two subspecies hybridize in the narrow region of sympatry; hybrids are sterile triploids with malformed spores.
Selected References
None.
Lower Taxa
None.