Cystopteridaceae
Fragile Fern Family
2 genera
4 species
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Cystopteris fragilisbladder fern, brittle fern, fragile fern
Distribution: Widespread on both sides of the Cascades crest in Washington; Alaska to California, east across the northern half of North America to the Atlantic Coast; circumboreal.
Habitat: Moist to moderately dry, often rocky places, lowlands to above timberline
Origin: Native
Gymnocarpium ×brittonianumhybrid oak fern
Origin: Native
Gymnocarpium disjunctumPacific oak fern, western fern
Distribution: Circumboreal, extending south in North America to Oregon, Arizona and Virginia.
Habitat: Moist woods, streambanks and wet cliffs.
Origin: Native
Gymnocarpium dryopteriscommon fern, northern oak fern
Distribution: Both sides of the Cascades in Washington; Alaska east across northern Canada, south to northern U.S., with disjunct populations scattered throughout western North America.
Habitat: Forest understory, often where moist
Origin: Native