Ballota undulata, commonly known as common ballota or horehound, is a species of flowering plant in the family Lamiaceae, native to the Mediterranean region including Egypt, Israel and Jordan. It is a compact, evergreen subshrub with a woody base, many hairy wiry stems, simple opposite leaves with toothed margins, and whorls of white flowers with funnel-shaped calyxes. It is a plant of semi-arid, acidic stony habitats and in Israel often grows in association with Echinops gaillardotii, Carlina corymbosa and Ziziphus lotus.