Distribution: Reported from Bingen, Washington - unclear as to whether truly native or a garden escape; chiefly east of the Rockies, but crossing into western Montana.
Habitat: Dry, open slopes, chiefly in the sagebrush area.
Flowers: June - August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bees, moths
Glabrous to stiff-hairy perennial, the stems several, decumbent, simple or freely-branched, 2-6 dm. tall.
Leaves alternate, many, sessile, linear-lanceolate to oblong-lanceolate, 1-3 cm. long, with a few shallow teeth, reduced upward.
Inflorescence of many-flowered spikes 5-20 cm. long, with bracts 3-9 mm. long; calyx tube slender, 5-9 mm. long, with 4 distinct, reflexed lobes; petals 4, red, pink or nearly white, 3-6 mm. long including the narrow claw, the blade oval to rhombic; stamens 8, filaments 3-5 mm. long, with tiny, linear scales at the base; style slightly longer than the stamens; stigma with 4 short, oval lobes from a cup-like base; ovary inferior, 4-celled.
Fruit hardened, 5-9 mm. long, somewhat spindle-shaped, sharply 4-angled, winged on the upper half.
PNW Herbaria: Specimen records of Oenothera suffrutescens in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Oenothera suffrutescens checklist entry
OregonFlora: Oenothera suffrutescens information
E-Flora BC: Oenothera suffrutescens atlas page
CalPhotos: Oenothera suffrutescens photos