E-Flora BC: Electronic Atlas of the Flora of British Columbia

Camissonia contorta (Douglas ex Lehm.) Kearney
contorted-pod evening-primrose (plains evening-primrose)
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants

© Pippi Lawn  Email the photographer   (Photo ID #75017)

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Distribution of Camissonia contorta
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Species Information

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Annual herb from a slender taproot; stems erect or spreading, 5-15 (40) cm tall, wiry, usually branched, often sprawling, peeling; hairs spreading, usually coarse, also sparsely glandular-hairy in inflorescence.
Alternate, linear to narrowly elliptic, (5) 10-30 mm long, entire to remotely toothed.
Inflorescence a leafy-bracted, nodding, terminal raceme; flowers unstalked or with short stalks; hypanthium 1.5-2 mm long; petals 3-5 mm long, yellow, fading reddish; sepals 2.5-4 mm long; stamens noticeably unequal, the longer set nearly twice the length of the shorter.
Capsules, linear, 2-4 cm long, only about 1 mm thick, cylindric, swollen by seeds, arched to nearly coiled, nearly stalkless, 4-chambered; seeds in 1 row per chamber, 0.7-0.9 mm long, shiny, minutely pitted.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Open, sandy areas in the lowland zone; rare on S Vancouver Island; S to CA, NV and ID.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Oenothera contorta Douglas ex Lehm.
Oenothera cruciata (S. Watson) Munz, nom. illeg., non Oenothera cruciata Nutt. ex G. Don
Oenothera dentata auct. non Cav.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References