Page authors: Don Knoke, David Giblin
Calypso bulbosa
WTU specimens
Other herbaria
WTU images

Distribution: Widely distributed throughout Washington; Alaska to Labrador, south to California and New York.

Habitat: Mostly in cool, deep shade of moist forests in soil rich in humus, sea level to mid-elevations in the mountains.

Flowers: March-June

Origin: Native

Conservation Status: Not of concern


Glabrous, perennial herbs from an ovoid corm, the stems upright, 5-20 cm. tall.


Leaves 1, produced at the top of the corm in the fall and persisting over the winter, withering in the summer; leaf blade longer than the petiole, broadly ovate-elliptic to oblong-ovate, 3-6 cm. long; scape with 2-3 bracts.


Flowers usually single; 3 sepals and 2 petals alike, erect, 15-22 mm. long, lanceolate, magenta with 3 deeper-colored veins; third petal a pendant, saccate lip, somewhat longer than the other petals and about 10 mm. wide, yellowish-purple or reddish-purple, streaked inside the sac with brownish-purple; stamens and style fused to form a magenta column over the opening to the lip.


Capsule about 1 cm. long.

Accepted Name:
Calypso bulbosa (L.) Oakes
Publication: Nat. Hist. Vermont. 1: 200. 1842.

Synonyms & Misapplications:
(none provided)
var. americana – calypso, fairy-slipper
var. occidentalis – calypso, fairy-slipper
Additional Resources:

PNW Herbaria: Specimen records of Calypso bulbosa in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Calypso bulbosa checklist entry.

E-Flora BC: Calypso bulbosa atlas page.

CalPhotos: Calypso bulbosa photos.

USDA Plants: Calypso bulbosa information.

90 photographs:
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