1. Ill-smelling European herb with rugose leaves and whorls of dark purple flowers
   "stinking horehound grew wild along the hedgerow despite its unpleasant smell";
   - black horehound, black archangel, fetid horehound, Ballota nigra

Derived forms: stinking horehounds

Type of: herb, herbaceous plant

Part of: Ballota, genus Ballota