Distribution: Occurring west of the Cascades crest in lowland western Washington; southwestern British Columbia to California.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed, open areas.
Flowers: May-July
Origin: Introduced from Europe
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bees, wasps
[none provided]
PNW Herbaria: Specimen records of Euphorbia oblongata in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Euphorbia oblongata checklist entry
OregonFlora: Euphorbia oblongata information
E-Flora BC: Euphorbia oblongata atlas page
CalPhotos: Euphorbia oblongata photos