Distribution: Occurring east of the Cascades crest in Washington, where endemic to Chelan, Kittitas, and Douglas counties.
Habitat: From sagebrush desert to ponderosa pine forest openings at low elevations.
Flowers: June-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Iliamna longisepala in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Iliamna longisepala checklist entry
OregonFlora: Iliamna longisepala information
E-Flora BC: Iliamna longisepala atlas page
CalPhotos: Iliamna longisepala photos