- flowers-of-an-hour as a noun:
- 1
flowers-of-an-hour
noun
1 flowers-of-an-hour
Annual weedy herb with ephemeral yellow purple-eyed flowers; Old World tropics; naturalized as a weed in North America.
synonyms: black-eyed Susan, bladder ketmia, flower-of-an-hour, Hibiscus trionum.
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