Distribution: East of the Cascades in Washington; Yukon Territory to Colorado.
Habitat: Slopes and forest openings from foothills to moderate elevations in the mountains.
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies
Stems are viny, climbing, or trailing at 0.25-2.5 m long.
Blade margins entire or less often crenate-serrate; leaflets unlobed or occasionally 1 or 3 lobed, 2-11cm long.
Sepals often wide-spreading, color varies from violet-blue to pale blue, rarely creamy white, lance-ovate and 3-6 cm long; margins fluted, acuminate at tips.
PNW Herbaria: Specimen records of Clematis occidentalis var. grosseserrata in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Clematis occidentalis var. grosseserrata checklist entry
OregonFlora: Clematis occidentalis var. grosseserrata information
E-Flora BC: Clematis occidentalis var. grosseserrata atlas page
CalPhotos: Clematis occidentalis var. grosseserrata photos