Distribution: Alaska to California, chiefly east of the Cascade summits in Washington and Oregon
Habitat: Rock crevices, ledges and talus slopes in the mountains, and in less arid parts of the lowlands.
Conservation Status: Not of concern
Tufted perennial from a short scaly rhizome.
All basal, 2-3 times pinnate, 8-35 cm long, covered with white hairs.
Grouped into small round sori on undersides of leaves; indusia with narrow lobed segments.
The hairy leaves and narrowly lobed indusia separate this species from W. oregana, which has glabrous leaves and indusia with hair-like segments, and Cystopteris fragilis, which has glabrous leaves and a hood-like indusia partially covering the sori.