Spherical inflorescence of buttonbush (Cephalanthus ...

The image presents a comparative view of buttonbush flowers, showcasing their appearance under natural daylight and when illuminated by a UV-A blacklight.

**Image Structure**

* The top half of the image displays a photograph of a spherical inflorescence of buttonbush exposed to regular daylight.
* The bottom half of the image shows an identical photograph taken with a 365 nm ultraviolet (UV-A) blacklight from a trailway near Birch Creek Unit of Somerville Lake State Park in Texas.

**Flower Characteristics**

* Under natural light, the flowers appear white and are evenly distributed across the spherical inflorescence.
* When illuminated by the UV-A blacklight, the flowers become visible as small green or yellowish dots on the surface of the sphere. The UV-A light causes a phenomenon known as fluorescence, which highlights the presence of certain chemicals or structures within the plant.

**Background**

* The background is solid black, allowing for clear visibility of the flower's appearance under different lighting conditions.

**Overall Impression**

The image effectively demonstrates how different lighting conditions can significantly impact the appearance of flowers. – AI vision