Cascade Azaela

Rhododendron albiflorum

Deciduous shrub with erect branched stems. Twigs have reddish hairs, peeling bark. Thin crinkled leaves are alternate in clusters, especially at stem tips. Leaves with rusty hairs on upper side, 2–4 in. long, oblong, turning brilliant reddish orange in autumn. Flowers clustered on last year's growth. Petals white, fused at base to form wide shallow bells with 5 lobes. Grows in moist to dry soils in conifer forests and along streams in upper forests and subalpine.
White Rhododendron  Cascade Azaela,Geotagged,Rhododendron albiflorum,Summer,United States

Appearance

General: 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: 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: 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.
Fruits: Capsule 5-celled, pubescent, short.
white rhododendron  Canada,Cascade Azaela,Geotagged,Rhododendron albiflorum,Summer

Distribution

British Columbia to Oregon, east to Montana
Cascade azaela  Cascade Azaela,Geotagged,Rhododendron albiflorum,Summer,United States

Habitat

Moist, usually forested, slopes, mid- to high elevations in the mountains

References:

Some text fragments are auto parsed from Wikipedia.

http://biology.burke.washington.edu/herbarium/imagecollection.php?Genus=Rhododendron&Species=albiflorum

http://www.pnwflowers.com/flower/rhododendron-albiflorum
Taxonomy
KingdomPlantae
DivisionAngiosperms
ClassEudicots
OrderEricales
FamilyEricaceae
GenusRhododendron
SpeciesRhododendron albiflorum