H. Sphondylium: stems four feet high, coarse, rough with short stiff hairs; leaves very large, pinnate, with 3-7 large broad segments, which are three-lobed or pinnatifid and toothed; umbels large, flattish, of about twenty rays; outer petals much larger than the rest; carpels nearly orbicular, flat. - Hogweed. - Pastures, hedges, and thickets. Fl. July.