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Jacobaea vulgaris - Ragwort

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Ragwort, Jacobaea vulgaris

Jacobaea vulgaris, syn. Senecio jacobaea, is a very common wild flower in the family Asteraceae that is native to northern Eurasia, usually in dry, open places, and has also been widely distributed as a weed elsewhere.

Common names include ragwort, common ragwort, stinking willie, tansy ragwort, benweed, St. James-wort, stinking nanny/ninny/willy, staggerwort, dog standard, cankerwort, stammerwort, mare's fart and cushag. In the western United States it is generally known as tansy ragwort, or tansy, though its resemblance to the true tansy is superficial.

Description

The plant is generally considered to be biennial but it has the tendency to exhibit perennial properties under certain cultural conditions (such as when subjected to repeated grazing or mowing). The stems are erect, straight, have no or few hairs, and reach a height of 0.3–2.0 metres (1 ft 0 in–6 ft 7 in). The leaves are pinnately lobed and the end lobe is blunt. The many names that include the word "stinking" (and Mare's Fart) arise because of the unpleasant smell of the leaves. The hermaphrodite flower heads are 1.5–2.5 centimetres (0.59–0.98 in) diameter, and are borne in dense, flat-topped clusters; the florets are bright yellow. It has a long flowering period lasting from June to November (in the Northern Hemisphere).

Uses

  • In ancient Greece and Rome a supposed aphrodisiac was made from the plant; it was called satyrion.
  • The leaves can be used to obtain good green dye, as yellow dye is obtained from the flowers, as can be done for brown and orange.

Common name

  • English - Ragwort

External Links