Flowers of smartweed (Persicaria, Polygonum) both in ...

The image features two photographs of smartweed flowers, one taken in natural light and the other under 365 nm ultraviolet (UV-A) blacklight. The natural light photograph shows the flowers as white with pinkish hues on their stamens.

* **Natural Light Photograph**
* The photo is a close-up view of the flower heads.
* The flower buds are closed, and the petals are not visible due to being tightly wrapped around the central stem.
* The stamen, which are usually yellowish in color, have turned pinkish in this particular species.
* **UV-A Blacklight Photograph**
* This photo is also a close-up view of the flower heads but taken under UV-A blacklight.
* Under UV-A light, the flowers appear to glow and reflect back a blue-green hue.
* The stamen remain pinkish in color.

The primary difference between the two photographs is that the natural light photograph captures the flowers' appearance as they naturally occur, while the UV-A blacklight photograph reveals a unique aspect of their structure and properties when exposed to ultraviolet radiation. This highlights the importance of considering different lighting conditions when observing or capturing images of biological specimens. – AI vision