Distribution: Occurring west of the Cascades crest in Washington; Alaska to Oregon and Idaho, east across Canada and the Great Lakes region to northeastern North America.
Habitat: Swamps and bogs at low to middle elevations.
Flowers: June-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies, beetles, moths, hummingbirds, sawflies
Evergreen shrubs 0.5-2 m. tall, the twigs strigose pubescent.
Leaves linear-elliptic, 2-6 cm long, leathery above and densely rusty-woolly on the underside, margins rolled toward the underside
Flowers 5-petaled and white, many, in short, terminal racemes; calyx short, 5-parted nearly to the base; stamens 5-10, slightly longer than the style, the anthers opening by pores near the tip; ovary superior.
Capsule 5-valved, ovoid, 4-5 mm. long, puberulent.
PNW Herbaria: Specimen records of Rhododendron groenlandicum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Rhododendron groenlandicum checklist entry
OregonFlora: Rhododendron groenlandicum information
E-Flora BC: Rhododendron groenlandicum atlas page
CalPhotos: Rhododendron groenlandicum photos