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

Brassica napus L.
turnip (rape; winter rape)
Brassicaceae (Mustard family)

Introduction to Vascular Plants
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Distribution of Brassica napus
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Species Information

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Annual or biennial herb from a taproot; stems up to 1.5 m tall, leafy.
Glaucous, glabrous or sparsely hairy; basal leaves pinnately lobed, often clasping at the bases; stem leaves somewhat pinnately lobed, stalked.
In elongate racemes; flower stalks slender, spreading to ascending; petals golden to dull yellow, 10-14 mm long.
Siliques, ascending, 5-10 cm long; styles beaked, 7-11 mm long; seeds about 1.8 mm long, finely honeycombed. Brassicaceae

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Early Spring
Fruit/Seed characteristics:
Colour: Black
Present over the Summer
Source:  The USDA

Habitat / Range

Mesic to dry fields and waste places in the lowland, steppe and montane zones; rare in BC south of 55degreeN; introduced from Eurasia.

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

Brassica napobrassica (L.) P. Mill.
Brassica napus var. napobrassica (L.) Reichenb.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References