Image: Yellow Day lily (Hemerocallis lilioasphodelus) spectral comparison Vis UV IR
Description: Comparison of a Yellow Day lily (Hemerocallis lilioasphodelus) flower in visible light (left), ultraviolet light (centre), and infrared light (right). In ultraviolet light the flower's throat has clear dark markings, acting as a " Nectar guide to bees and other insects that can see UV light. The anthers also appear darker in UV. In infrared light the anthers appear brighter than they do in visible light. The foliage behind the flower appears brighter as well.
Title: Yellow Day lily (Hemerocallis lilioasphodelus) spectral comparison Vis UV IR
Credit: Own work
Author: Dave Kennard
Permission: Image licensed CC-BY-SA 3.0 Please credit image to David Kennard / www.davidkennardphotography.com
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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