Original: Selected species Ballota acetabulosa Ballota frutescens Ballota hirsuta Ballota nigra - Black Horehound Ballota pseudodictamnus The genus is closely related to Marrubium, with some species having been included in that genus in the past.
Simplified: Species Ballota acetabulosa Ballota frutescens Ballota hirsuta Ballota nigra - Black Horehound Ballota pseudodictamnus The genus is closely related to Marrubium, with some species having been included in that genus in the past.