- A genus of plants (Funkia) differing from the last in having ovate veiny leaves, and large white or blue flowers.
- A genus of plants (Hemerocallis) closely resembling true lilies, but having tuberous rootstocks instead of bulbs. The common species have long narrow leaves and either yellow or tawny-orange flowers.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). day lily. Retrieved September 25, 2026, from http://smartdefine.org/day_lily/definitions/1994616 |
| Chicago | Webster's. 2011. "day lily" http://smartdefine.org/day_lily/definitions/1994616 (accessed September 25, 2026). |
| Harvard | Webster's 2011, day lily, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/day_lily/definitions/1994616>. |
| MLA | Webster's. "day lily" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/day_lily/definitions/1994616> |