black horehound

Từ điển WordNet v3.1 - WordNet Dictionary

noun

ill-smelling European herb with rugose leaves and whorls of dark purple flowers
• Syn:
black archangel, fetid horehound, stinking horehound, Ballota nigra
• Hypernyms:
herb, herbaceous plant
• Member Holonyms:
Ballota, genus Ballota