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

Brassica rapa L.
field mustard (bird's rape)
Brassicaceae (Mustard family)

Introduction to Vascular Plants

© Dave Ingram  Email the photographer   (Photo ID #19886)

E-Flora BC Static Map
Distribution of Brassica rapa
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Species Information

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Annual herb from a taproot; stems glabrous or sparsely hairy, glaucous, 20-40 cm tall, simple to freely branched.
Basal leaves slender-stalked, pinnately cleft with the terminal lobe the largest, 2-4 lateral lobes, the terminal lobe egg-shaped, wavy-toothed; lowermost stem leaves similar to the basal but ear-like at the bases and clasping or unstalked, upper oblong, narrowly egg-shaped or lanceolate, subentire.
In terminal clusters; flower stalks stout, ascending, 7-25 mm long; petals yellow, 6-8 mm long; sepals 3-4 mm long.
Siliques, ascending to spreading, 3-7 cm long, 2.5-3.5 mm wide, straight; styles beaked, 10-15 mm long; seeds 1.5 mm long, minutely honeycombed.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Blooming Period:
Late Spring
Fruit/Seed characteristics:
Colour: Brown
Present over the Summer
Source:  The USDA

Habitat / Range

Mesic to dry roadsides, fields and waste places in the lowland, steppe and montane zones; frequent in BC S of 56degreeN; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia

Synonyms and Alternate Names

Brassica campestris L.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References