Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Texas.
Habitat: Forest openings, meadows, and open hillsides from low to moderate elevations.
Origin: Native
Conservation Status: Not of concern
Pollination: Ants, bees, flies, butterflies, beetles, wasps
[none provided]
PNW Herbaria: Specimen records of Galium mexicanum ssp. asperulum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Galium mexicanum ssp. asperulum checklist entry
OregonFlora: Galium mexicanum ssp. asperulum information
E-Flora BC: Galium mexicanum ssp. asperulum atlas page
CalPhotos: Galium mexicanum ssp. asperulum photos