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

Coronopus didymus (L.) Sm.
lesser swine-cress (lesser swinecress)
Brassicaceae (Mustard family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #7409)

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Distribution of Coronopus didymus
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Species Information

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Annual herb from a taproot; stems many-branched, prostrate to decumbent, 20-50 cm long; glabrous to scurfy-hairy or lightly stiff-hairy.
Basal leaves few; stem leaves many, egg-shaped-oblong, very deeply pinnately lobed, 1.5-3 cm long, the lobes narrow, entire to toothed or dissected, stalked below, becoming shortly-stalked above.
In numerous axillary racemes; flower stalks slender, 1.5-2.5 mm long; petals white, linear, 0.5 mm long; sepals deciduous, about 0.5 mm long.
Silicles, inflated, wrinkled, about 2 mm wide, 1.5 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic fields and waste places in the lowland zone; infrequent in SW BC, known only from SE Vancouver Island and Vancouver; introduced from S America.

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

Carara didyma (L.) Britt.
Lepidium didymum L.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References