Easily confused with : Flower [a plant of similar name]

Not to be confused with : [a plant with similar name]

Hybridises with :

• Wild Radish to produce Raphanus raphanistrum subsp. maritimus × subsp. raphanistrum (no common name)
• Garden Raddish (Raphanus × sativus) in complicated ways.

Some similarities to : Isle of Man Cabbage, which also has four yellow petals, but with Isle of Man Cabbage the petals are much rounder rather than ling and thin. There are no pimples with hairs atop (most likely trichomes). And Isle of Man Cabbage grows to only half the height (60cm), and the pinnate leaves are all lobed and without serrated teeth and are also grey green. Also the seed pods are long and thin on Isle of Man Cabbage, whereas they are conspicuously beaded with spherical lumps on Sea Radish.

Lundy Cabbage, another yellow-flowered member of the Cabbage Family with which it may possibly be confused, is much rarer, only found on Lundy Isle, has flowers of a deeper yellow and is only a short-lived perennial.

Wallflower Cabbage is yellow but taller, but grows mainly in Monmouthshire.

Other yellow Brassicas with which it may be mistaken for from afar: Oil-seed Rape, Wild Turnip, Wild Cabbage, Black Mustard, Hoary Mustard, Charlock, Hoary Mustard, White Mustard, Bastard Cabbage, Steppe Cabbage, and many many more...

Grows on bare ground near the sea. Garden Radish, with which it may possibly be confused by name, is much shorter, less than a foot in height, and the flowers, never yellow, are usually white or lilac; the pods hardly beaded.

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