Annual Wall-rocket - Diplotaxis muralis
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Species Description
Widespread and fairly frequent throughout the UK but mainly in the South. Habitat includes: Dry, open places such as wasteland, railways, roads, tips, rocks, cliffs, walls, gardens, cultivated and ploughed land (as a 'green manure') etc. Growing habit: Annual to short-lived Perennial. Height: Up to 60 cm. Flowers: June to September. First recorded in 1778 in a field of oats raised from imported seeds from a ship wrecked on the Kent coast. Native of Central & Southern Europe and North Africa.
Stace 4:
Diplotaxis muralis (L.) DC. - Annual Wall-rocket.
Glabrous or sparsely hairy annual or sometimes short-lived perennial with branched stems to 60cm leafy only near base; leaves with lobes <3x as long as wide; petals 4-8(8.5)mm; fruit (1.2)1.5-4.2cm, erecto-patent, with pedicel usually <1/2 as long as fruit; (2n=42). Neophyte-naturalised; dry waste places, rocks, walls and arable land; similar distribution to D. tenuifolia except also scattered in Ireland; Europe.
Key:
- Petals yellow; fruit with beak 1-3(3.5)mm
- Fruit with base of valves immediately above sepal-scars; petals 4-8(8.5)mm