Publication: Canad. Naturalist & Quart. J. Sci. n. s. 2: 90. 1865.

Origin: Native

selected vouchers: WTU

Notes: FNA2: "The variability and promiscuity of Woodsia oregana have been major sources of taxonomic difficulties in Woodsia , and more work will be necessary before relationships in this complex are fully resolved. As defined here, W . oregana comprises two subspecies that are chromosomally and biochemically distinct. In addition, the two taxa are nearly allopatric, with the diploid (subsp. oregana ) confined to the Pacific Northwest and the tetraploid (subsp. cathcartiana ) extending from the southwestern United States to eastern Canada."

References: (none)