Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east to the Great Plains, also in eastern North America.
Habitat: Roadsides, fields, irrigation ditches, and other disturbed open areas where moist.
Flowers: May-July
Origin: Introduced from Eurasia
Growth Duration: Annual
Conservation Status: Not of concern
Pollination: Bees, flies
Annual herb with weak scrambling stems bearing minute backwards pointing prickles.
Simple, spoon-shaped, lightly hairy.
Small, blue to violet ,with 5 lobes at tip.
4 tiny nutlets.
The strongly toothed calyx that encloses the fruits like a clam shell is distinctive; look also for the small blue flowers and backward pointing prickles on the stems.
PNW Herbaria: Specimen records of Asperugo procumbens in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Asperugo procumbens checklist entry.
OregonFlora: Asperugo procumbens information.
E-Flora BC: Asperugo procumbens atlas page.
CalPhotos: Asperugo procumbens photos.
USDA Plants: Asperugo procumbens information.