Thapsia villosa, commonly known as the villous deadly carrot, is a species of poisonous herbaceous plants in the genus Thapsia. It grows to about 70 to 190 cm (28 to 75 in) in height. It has pinnate hairy leaves with sheath-like petioles. The flowers are yellow in color and borne on compound umbels. They develop into fruits with four wings characteristic of the genus. It is native to southwestern Europe and northwestern Africa surrounding the Mediterranean Sea. The plant was used extensively for traditional medicine since around the 3rd century BC.

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