Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to Alberta, Idaho, and Montana.
Habitat: Moist, usually forested, slopes, middle to high elevations in the mountains.
Flowers: June-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies, beetles, moths, hummingbirds, sawflies
Deciduous shrubs 1-2 m. tall, the young twigs finely puberulent and covered with stiff, aligned reddish hairs, this same hairiness present on young leaves, bracts and calyx.
Leaves thin, deep, clear green on the upper surface, lighter beneath, elliptic-oblanceolate, nearly entire, frequently clustered toward the branch tips, 4-9 cm. long on petioles 5-10 mm. long.
Flowers in axillary clusters of 1-4 along the stems, white to ochroleucous; pedicels 1-1.5 cm. long, glandular pubescent and covered with coarse, stiff reddish hairs; sepals 5, distinct, leaf-like, pubescent with coarse, gland-tipped hairs and appressed, eglandular, reddish hairs; corolla united, 1.5-2 cm. broad, 5-lobed about the length, the lobes spreading, nearly equal, entire; stamens 10, exerted, the filaments densely hairy on the lower half; ovary superior, long-hairy.
Capsule 5-celled, pubescent, short.
PNW Herbaria: Specimen records of Rhododendron albiflorum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Rhododendron albiflorum checklist entry
OregonFlora: Rhododendron albiflorum information
E-Flora BC: Rhododendron albiflorum atlas page
CalPhotos: Rhododendron albiflorum photos