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Tall Rocket

Sisymbrium altissimum

Please keep in mind that it is illegal to uproot a plant without the landowner's consent and care should be taken at all times not to damage wild plants. Wild plants should never be picked for pleasure and some plants are protected by law.
For more information please download the BSBI Code of Conduct PDF document.

Plant Data

Flowering Months:
JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC
Order:
Brassicales
Family:
Brassicaceae (Cabbage)
Type:
Flower
Maximum Size:
80 centimetres tall
Habitats:
Roadsides, seaside, wasteland.

Flower:
֍
Yellow, 4 petals
 
The pale yellow flowers are approximately 1cm in diameter. The clusters of flowers appear at the ends of the branches. 4 narrow curved sepals. 6 greenish stamens, 4 long and 2 short. Insect-pollinated.
Fruit:
Long seedpods, not appressed to the main stems. Between 5 and 10cm in length. The many-seeded fruit ripen from July to September.
Leaves:
A slender looking, annual flower with pinnate leaves and very narrow leaf lobes, in particular the topmost leaf lobes. The leaves are arranged alternately along the stems. They have toothed margins, are about 8 inches long and 3 inches wide. The edges of the leaves are hairy. The lower leaves are short-stalked.
Other Names:
Jim Hill Mustard, Tall Hedge Mustard, Tall Sisymbrium, Tall Tumble Mustard, Tumble Mustard, Tumbleweed Mustard.
Frequency (UK):
Occasionally seen  
Distribution Map

Reproduced by kind permission of the BSBI.

Click to open an Interactive Map