Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to Baja California, east to New Mexico.
Habitat: Rock crevices and open, rocky slopes generally at low elevations.
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
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PNW Herbaria: Specimen records of Pentagramma triangularis in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Pentagramma triangularis checklist entry.
E-Flora BC: Pentagramma triangularis atlas page.
CalPhotos: Pentagramma triangularis photos.
USDA Plants: Pentagramma triangularis information.