Conium
(from konao, to whirl around; in reference to the giddiness caused by eating the leaves). Hemlock. ORD. Umbelliferae. Biennial poisonous herbs. Involucre of three to five leaves; involucels dimidiate. Leaves decompound. Stem terete, branched, Root fusiform. Not more than two or three species are known, of which one (C. chaerophylloides) is South African and Abyssinian. The