whorlywort

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a tall perennial herb having spikes of small white or purple flowers;
common in eastern North America
• Syn:
Culver's root, Culvers root, Culver's physic, Culvers physic, Veronicastrum virginicum
• Hypernyms:
asterid dicot genus
• Member Holonyms:
Scrophulariaceae, family Scrophulariaceae, figwort family, foxglove family