Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and Great Plains.
Habitat: Rock crevices, ledges and talus slopes in the mountains, and in less arid parts of the lowlands.
Growth Duration: Perennial
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.