Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California; also in eastern North America.
Habitat: Roadsides, cliffs, embankments, fields, parks, forest edge, wastelots, and other disturbed areas.
Flowers: May-July
Origin: Introduced from Turkey and Bulgaria
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies, wasps
[none provided]
PNW Herbaria: Specimen records of Hypericum calycinum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Hypericum calycinum checklist entry
OregonFlora: Hypericum calycinum information
E-Flora BC: Hypericum calycinum atlas page
CalPhotos: Hypericum calycinum photos