flowers-of-an-hour

Từ điển WordNet v3.1 - WordNet Dictionary

noun

annual weedy herb with ephemeral yellow purple-eyed flowers;
Old World tropics;
naturalized as a weed in North America
• Syn:
flower-of-an-hour, bladder ketmia, black-eyed Susan, Hibiscus trionum
• Hypernyms:
hibiscus