Orange Hawkweed (Pilosella aurantiaca) [Vis UV IR]

Comparison of a Orange Hawkweed (Pilosella aurantiaca) flower in visible light (top), ultraviolet light (centre), and infrared light (bottom).

The flower appears slightly different in ultraviolet compared to visible light. In UV the flower gets darker towards the centre of the flower, with an area quite a bit darker than the rest of the flower around the centre. The very centre (possibly the tips of petals that have yet to unfurl?) is quite bright.

In visible light the flower gets lighter towards the centre, while the very centre is darker.

In infrared light the flower does not have much tonal variation other than a slight dark ring around the centre of the flower (also present in visible light).

Yellow Day lily (Hemerocallis lilioasphodelus) [Vis UV IR]

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.

Wisteria flower [Vis UV IR]

A Wistera flower photographed in visible light (right), ultraviolet light (centre), and infrared light (right).

In visible light the flower appears white with a yellow colouration around the middle of the banner.

In ultraviolet light the base of the banner has a darker area (nectar guide).

In infrared light the flower does not seem to have any markings visible.

This image is free for you to use and is licensed under the Creative Commons licence CC-BY-SA 3.0. If you use this image please credit Dave Kennard / www.davidkennardphotography.com.

Wild Strawberry (Fragaria vesca) [Vis UV IR]

Spectral comparison of a Wild Strawberry (Fragaria vesca) flower in reflected visible light (top), ultraviolet light (middle) and infrared light (bottom).

The flower has a clear UV nectar guide pattern, with the petals appearing darker at the base in ultraviolet. The centre of the flower also appears much darker in ultraviolet.

In infrared the centre of the flower appears much brighter than it does under visible light.

This image is free for you to use and is licensed under the Creative Commons licence CC-BY-SA 3.0. If you use this image please credit Dave Kennard / www.davidkennardphotography.com.

Clematis montana cultivar flowers [Vis UV IR]

Spectral comparison of the flowers of a Clematis montana cultivar. The top image shows the flowers in visible light, the middle image in ultraviolet light, and the bottom image in infrared light.

The petals do not have any UV markings visible, but the centre of the flower does appear much darker in ultraviolet.

The leaves and flowers both reflect similar amounts of infrared light.

This image is free for you to use and is licensed under the Creative Commons licence CC-BY-SA 3.0. If you use this image please credit Dave Kennard / www.davidkennardphotography.com.

Herb Robert (Geranium robertianum) [Vis UV IR]

Spectral comparison of Herb Robert (Geranium robertianum) using reflected visible light (top), ultraviolet light (middle), and infrared light (bottom). In ultraviolet light the flower's UV nectar guides) are visible, being darker near the centre of the flower than the edges.

This image is free for you to use and is licensed under the Creative Commons licence CC-BY-SA 3.0. If you use this image please credit Dave Kennard / www.davidkennardphotography.com.

Daisy flower (Bellis perennis) [Vis UV IR]

Spectral comparison of a Common Daisy flower (Bellis perennis) photographed with reflected visible light (top), ultraviolet light (middle), and infrared light (bottom). The flower does not have any ultraviolet markings on its petals, but the centre appears much darker in ultraviolet. The tonality of the flower is much the same under infrared light as it is in visible light.

This image is free for you to use and is licensed under the Creative Commons licence CC-BY-SA 3.0. If you use this image please credit Dave Kennard / www.davidkennardphotography.com.