Page authors: Don Knoke, David Giblin
Rhododendron macrophyllum
California rhododendron, Pacific rhododendron

Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.

Habitat: Moist woods, sea level to moderate elevations in the mountains.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bumblebees, bees, flies, beetles, moths, hummingbirds, sawflies


Evergreen shrubs 1-5 m. tall, the branches puberulent when young, becoming glabrate.


Leaves alternate, leathery, glabrous, entire, oblong-elliptic, 8-20 cm. long.


Flowers many in terminal, somewhat flat-topped inflorescences; pedicels glabrous; calyx minute; corolla united, narrowly bell-shaped, 2.5-4 cm. long, pale pink to deep rose-purplish, deeply 5-lobed, the lobes spreading, wavy; stamens 10, unequal, the longer ones exerted, filaments sparsely short-hairy on the lower half; ovary superior, hairy.


Capsule 4- or 5-celled, short, with heavy walls

Accepted Name:
Rhododendron macrophyllum D. Don ex G. Don
Publication: Gen. Hist. 3: 843. 1834. 1834.

Synonyms & Misapplications:
Rhododendron californicum Hook.
Additional Resources:

PNW Herbaria: Specimen records of Rhododendron macrophyllum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Rhododendron macrophyllum checklist entry.

OregonFlora: Rhododendron macrophyllum information.

E-Flora BC: Rhododendron macrophyllum atlas page.

CalPhotos: Rhododendron macrophyllum photos.

USDA Plants: Rhododendron macrophyllum information.

45 photographs:
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