Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to central California.
Habitat: Thickets, forest openings, shorelines, balds, parks, and grasslands.
Flowers: May-July
Origin: Introduced from southeast Asia
Growth Duration: Perennial
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Cotoneaster simonsii in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Cotoneaster simonsii checklist entry
OregonFlora: Cotoneaster simonsii information
E-Flora BC: Cotoneaster simonsii atlas page
CalPhotos: Cotoneaster simonsii photos