We do not often or never ask ourselves this question.
Do you think of them as just flowers, or do they remind you of someone special? Anything that comes to mind about daylilies, just plop them on this thread. Give yourself sometime to think about it, you may realize how fascinating/meaningful your answer is?
I'll start:
Whenever I come across a daylily, I think of my stepmother, same goes with an iris. Both of these flowers make me think of the memories we shared, especially those memories gardening together. As a small child I used to think that both plants looked very similar (their foliage) and remembered often asking her which plants were either irises or daylilies.
I own a daylily that always reminds me of her.
Daylily (Hemerocallis 'Sun Bear')
The first iris I remember seeing of hers was at her house in Cambridge, NE. It was so long ago (I was about 5 years old), I remember them having some light purple. Believing they were The Common Purple iris (AKA: Alcazar)