Page authors: Don Knoke, David Giblin
Calochortus lyallii
Lyall's mariposa-lily

Distribution: Occurring east of the Cascades crest in central Washington; British Columbia south along the east slope of the Cascades to south-central Washington.

Habitat: Dry, open coniferous forests at moderate to mid-elevations in the mountains.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, beetles


Perennial herb from a deep-seated bulb, the stem erect, 1-5 dm. tall.


Basal leaf flat, 1-2 dm. long and 2-20 mm. broad, not exceeding the inflorescence; a single bract-like cauline leaf about mid-stem.


Umbel 1-4 flowered; flowers white or purplish tinged, with a purple crescent on each petal above the gland and a similar spot on each sepal; pedicels slender, erect or spreading; sepals 3, about equal to the petals, lanceolate, glabrous; petals 3, ovate to lanceolate, pointed, abruptly contracted at the base to a short claw, conspicuously fringed with long, slender hairs; gland transverse, arched upward, bordered above with a fringed membrane and below with a narrower membrane, the enclosed surface covered with thick processes; stamens 6, style short, stigma trifid, persistent.


Capsule elliptic, 3-winged, erect.

Accepted Name:
Calochortus lyallii Baker
Publication: J. Linn. Soc., Bot. 14: 305. 1874.

Synonyms & Misapplications:
Calochortus ciliatus B.L. Rob. & Seaton
Additional Resources:

PNW Herbaria: Specimen records of Calochortus lyallii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Calochortus lyallii checklist entry.

OregonFlora: Calochortus lyallii information.

E-Flora BC: Calochortus lyallii atlas page.

CalPhotos: Calochortus lyallii photos.

USDA Plants: Calochortus lyallii information.

75 photographs:
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