Partridge pea (Cassia fasciculata) when exposed ...

The image presents a striking comparison between the appearance of Partridge pea flowers under regular daylight and when illuminated by a 365 nm ultraviolet (UV-A) blacklight. The left side of the image features two yellowish-orange Partridge peas, showcasing their natural coloration against a dark background. In contrast, the right side reveals the same plants exposed to UV light, where they exhibit bright orange petals with red and purple accents.

**Key Observations:**

* **Daylight Appearance:** The flowers appear yellowish-orange in daylight.
* **UV Light Effect:** Under UV illumination, the flowers transform into bright orange with red and purple highlights.
* **Background:** A dark background is used to accentuate the color changes.

**Conclusion:**

The image effectively demonstrates the phenomenon of fluorescence in plants, where certain wavelengths of light cause them to emit their own light. This effect is particularly evident in the Partridge pea flowers when exposed to UV-A radiation, highlighting the unique characteristics of these plants under different lighting conditions. – AI vision