white snakeroot

Từ điển WordNet v3.1 - WordNet Dictionary

noun

American herb having flat-topped clusters of small white flower heads;
reputedly a cause of trembles and milk sickness;
sometimes placed in genus Eupatorium
• Syn:
white sanicle, Ageratina altissima, Eupatorium rugosum
• Hypernyms:
herb, herbaceous plant
• Member Holonyms:
Ageratina, genus Ageratina