noun
- Annual weedy herb with ephemeral yellow purple-eyed flowers; Old World tropics; naturalized as a weed in North America.
- synonyms: flowers-of-an-hour, bladder ketmia, black-eyed Susan, Hibiscus trionum
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). flower-of-an-hour. Retrieved October 2, 2026, from http://smartdefine.org/flower-of-an-hour/definitions/1238304 |
| Chicago | WordNet. 2010. "flower-of-an-hour" http://smartdefine.org/flower-of-an-hour/definitions/1238304 (accessed October 2, 2026). |
| Harvard | WordNet 2010, flower-of-an-hour, Smart Define, viewed 2 October, 2026, <http://smartdefine.org/flower-of-an-hour/definitions/1238304>. |
| MLA | WordNet. "flower-of-an-hour" 23 October 2010. Web. 2 October 2026. <http://smartdefine.org/flower-of-an-hour/definitions/1238304> |