Coral bean (Erythrina herbacea) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas

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College Station - Sam Houston Forest, Texas, October 14 - 19, 2024

Album 3632: College Station - Sam Houston Forest, Texas, October 14 - 19, 2024

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This photograph presents two side-by-side images of coral bean seeds, showcasing their appearance under regular daylight and when illuminated by a blacklight emitting UV-A radiation.

**Top Image: Daylight Exposure**

The top image features four pods filled with six to seven bright red seeds that are smooth to the touch. The seedpods are elongated, twisted, and dark brown, appearing somewhat gnarled, as if they have been weathered by years of exposure to the sun and rain.

**Bottom Image: Blacklight Illumination**

In contrast, the bottom image reveals a striking transformation when exposed to UV-A radiation from a 365 nm blacklight. The seeds exhibit a vibrant fluorescent effect, taking on a bright pinkish-red hue that seems almost neon in color. This phenomenon is likely due to the presence of anthocyanin pigments within the seed, which are known for their fluorescent properties under ultraviolet light.

**Comparison and Conclusion**

The comparison between the two images highlights the unique visual effects that can be observed when using UV-A radiation on certain plant materials. The coral bean seeds in this photograph demonstrate a notable response to blacklight illumination, making them an interesting subject for further study or artistic application. – AI vision

🇪🇸 Descripción en español / Spanish Description

Fava de coral (Erythrina herbacea) cuando se expone a la luz diurna regular, así como también cuando es iluminada por una lámpara negra de 365 nm ultravioleta (UV-A) del Sand Branch Loop Trail en el Bosque Nacional Sam Houston cerca de Montgomery. Texas, octubre 19, 2024. Esta fotografía presenta dos imágenes uno al lado del otro de las semillas de fava de coral, mostrando su apariencia bajo la luz diurna regular y cuando es iluminada por una lámpara negra que emite radiación UV-A.
**Imagen superior: Exposición a la luz del día** En la imagen superior se muestran cuatro vainas rellenas de seis a siete semillas rojas brillantes que son suaves al tacto. Las vainas son alargadas, retorcidas y marrón oscuro, lo que les da un aspecto enrevesado, como si hubiesen sido erosionados por años de exposición al sol y la lluvia.
**Imagen inferior: Iluminación con luz negra** En contraste, la imagen inferior muestra una transformación sorprendente cuando se expone a radiación UV-A de una lámpara negra de 365 nm. Las semillas presentan un efecto fluorescente vívido, adoptando un tono rosado brillante que parece casi neón en color. Este fenómeno es probablemente debido a la presencia de pigmentos antocianinas dentro de las semillas, que son conocidos por sus propiedades fluorescentes bajo luz ultravioleta.
**Comparación y conclusión** La comparación entre las dos imágenes destaca los efectos visuales únicos que se pueden observar cuando se utiliza radiación UV-A en ciertos materiales vegetales. Las semillas de fava de coral en esta fotografía demuestran una notable respuesta a la iluminación con luz negra, lo que las convierte en un interesante sujeto para estudios adicionales o aplicaciones artísticas. – Spanish translation

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