A daylily flower in which a significant area changes to a completely different color during the day (such as from red to yellow) without visible wilting or loss of substance. The term does not include flowers that merely become a lighter shade of the original color. Environmental factors such as light source may influence the degree of color change.

Color-change as illustrated in a time lapse with H. ‘Pigment of Imagination’ (Norris-R., 2008)

Photo sequence by James Mullins

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The American Daylily Society