B. fruticulosa has a similar odour to cabbage and broccoli, when crushed. The plant's stem is smooth and erect, varies from grey to green in colour, and can reach a height of 50 centimetres. The upper and lower leaves are stemmed, with the lower leaves being lyre-shaped, lobed near the base, and bristly in parts. The lower leaves measure up to 15 centimetres. The plant produces 10 millimetre-long, pale yellow flowers with four petals each, on short stalks, with many branches forming at the end of a stem. It also bears a pea pod-shaped siliqua which has a lumpy appearance and measures 2-4 centimetres in length. The seeds, when mature, are brown and spherical in appearance.
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