Woodsia oregana subsp. oregana
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
Alta., B.C., Sask., Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.
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.