Page authors: Don Knoke, David Giblin
Cassiope tetragona
four-angled moss-heather

Distribution: Occurring on both sides of the crest in the North Cascades Mountains of Washington; Alaska to Washington, also in Montana

Habitat: Open, rocky areas in the subalpine and alpine.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Low, spreading shrubs, the flowering stems 5-30 cm. tall, the branches puberulent.


Leaves opposite, concealing the stems, 4-ranked, 3-5 mm. long, rather thick, sessile, lanceolate; leaves with prominent dorsal grooves, conspicuously puberulent.


Flowers few, sub-terminal, 4-7 mm. long; pedicels 10-25 mm. long; sepals 5, nearly distinct, reddish, ovate, entire; corolla white, bell-shaped, the 5 lobes ovate, about as long as the tube; stamens 10, included; anthers globose, with recurved awns from the back, opening by false terminal pores; ovary superior.


Fruit a 5-celled, globose capsule.

Accepted Name:
Cassiope tetragona (L.) D. Don
Publication: Edinburgh New Philos. J. 17: 158. 1834.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Cassiope tetragona in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Cassiope tetragona checklist entry.

OregonFlora: Cassiope tetragona information.

E-Flora BC: Cassiope tetragona atlas page.

CalPhotos: Cassiope tetragona photos.

USDA Plants: Cassiope tetragona information.

9 photographs:
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