Page authors: Don Knoke, David Giblin
Calochortus eurycarpus
big-pod mariposa lily, wide-fruited mariposa lily

Distribution: Occurring east of the Cascades crest in southeastern Washington; southeastern Washington to eastern Oregon, east to Montana and Wyoming.

Habitat: Grasslands and open coniferous forests at moderate elevations.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Review Group 1 in Washington (WANHP)

Pollination: Bees, beetles


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


Basal leaf flat, 1-3 dm. long and 5-25 mm. broad, exceeded by the inflorescence; single, bract-like cauline leaf about mid-stem.


Umbel 1-5 flowered, the flowers creamy white to lavender, with a conspicuous red-purple blotch in the middle of each petal; sepals 3, broadly lanceolate, much shorter than the petals; petals 3, obovate, wedge-shaped; gland triangular, bordered below with a narrow, fringed membrane and above with a narrower membrane with rounded teeth, the enclosed surface densely covered with long, yellowish processes; stamens 6, in 2 series; style short, stigma trifid, persistent.


Capsule 3-winged, elliptic-oblong, erect.

Accepted Name:
Calochortus eurycarpus S. Watson
Publication: Botany (Fortieth Parallel). 348. 1871.

Synonyms & Misapplications:
Calochortus euumbellatus A. Nels.
Calochortus nitidus Douglas var. eurycarpus L.F. Hend.
Calochortus parviflorus Baker
Additional Resources:

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

WA Flora Checklist: Calochortus eurycarpus checklist entry.

OregonFlora: Calochortus eurycarpus information.

E-Flora BC: Calochortus eurycarpus atlas page.

CalPhotos: Calochortus eurycarpus photos.

USDA Plants: Calochortus eurycarpus information.

39 photographs:
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