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FNA | Family List | FNA Vol. 2 | Dryopteridaceae | Woodsia

8a. Woodsia oregana subsp. oregana D. C. Eaton

Cells on pinnule margins regular in shape, margins appearing entire; adaxial epidermal cells averaging less than 120 µm. Spores averaging 39--45 µm. 2 n = 76.

Sporulating summer--fall. Cliffs and rocky slopes; usually on granitic or volcanic substrates; 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.


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