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FALSE LONDON-ROCKET Sisymbrium loeselii (Brassicaceae) Height to 60cm. Straggly, upright annual with bristly hairy lower stems. Found on waste ground. FLOWERS are 4-6mm across, the 4 yellow petals twice as long as the sepals (Jun-Aug). FRUITS are 2-4cm long pods that do not overtop the flowers. LEAVES are deeply pinnately lobed. STATUS-Casual in S Britain; sometimes naturalised, mainly in London.