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

Sinapis arvensis L.
corn mustard (charlock; wild mustard)
Brassicaceae (Mustard family)

Introduction to Vascular Plants

© Kevin Newell  Email the photographer   (Photo ID #2701)

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Distribution of Sinapis arvensis
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Species Information

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Annual herb from a taproot; stems 30-100 cm tall, simple to freely branched, hairy with awl-like or bristlelike hairs throughout or just on lower stem.
Basal leaves variable, from simple and wavy-margined and toothed to pinnately cleft with the terminal lobe the largest, 5-15 cm long; upper stem leaves simple.
In compound terminal clusters, to 30 cm long, flower stalks stout, 2-6 mm long, erect or ascending; petals yellow, 8-14 mm long; sepals 4-5 mm long.
Siliques, glabrous or somewhat hairy, straight or slightly curved, (3) 4-5 cm long, 2 mm wide, often constricted between seeds; styles beaked, conspicuously flattened, about 2 mm long; seeds 7-12, about 2 mm long, finely honeycombed.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry field and waste places in the lowland and steppe zones; rare in SW and SC BC; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia

Synonyms and Alternate Names

Brassica kaber (D.C.) L.C. Wheeler)

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References