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.
Publication: Brittonia. 23: 370. 1971. 1971.
Clematis columbiana (Nutt.) Torr. & A. Gray, misapplied [FNA3, HC, HC2]
Clematis columbiana (Nutt.) Torr. & A. Gray var. columbiana, misapplied [FNA3, HC, HC2]
Clematis occidentalis (Hornem.) DC. ssp. grosseserrata (Rydb.) R.L. Taylor & McBryde
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.
USDA Plants: Clematis occidentalis var. grosseserrata information.
