Distribution: Occurring east of the Cascades crest in north-central and eastern Washington; Yukon Territory to Nevada, east to the Rocky Mountains.
Origin: Native
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Zizia aptera var. occidentalis in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Zizia aptera var. occidentalis checklist entry
OregonFlora: Zizia aptera var. occidentalis information
E-Flora BC: Zizia aptera var. occidentalis atlas page
CalPhotos: Zizia aptera var. occidentalis photos