Close-up of a twig of elm tree with folious lichens Teloschistes exilis and Parmotrema hypotropum when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a trailway near Birch Creek Unit of Somerville Lake State Park. Texas

🎞️ #3610-18

The image shows two photographs of folious lichens on an elm tree twig. The upper photo is taken under regular daylight, while the lower photo is illuminated by a UV-A blacklight.

**Daylight Photograph:**

* The twig is covered with greenish-gray lichens.
* Some areas have yellow or orange spots that resemble small dots of paint.

**UV-A Blacklight Photograph:**

* Under UV-A light, the white lichen Teloschistes exilis glows bright red, while Parmotrema hypotropum glows a vibrant coral color.
* The twig and other background elements appear dark or black due to their lack of fluorescence under UV-A light.

**Comparison:**

* In contrast to the UV-A illuminated photo, the daylight photograph shows no fluorescent colors on either lichen species. – AI vision

🇪🇸 Descripción en español / Spanish Description

Primer plano de una ramita de olmo con líquenes foliosos Teloschistes exilis y Parmotrema hypotropum cuando se expone a la luz diurna regular, así como cuando se ilumina con una luz negra ultravioleta (UV-A) de 365 nm desde un camino cerca de Birch Creek Unit of Somerville Lake State Park. Texas, agosto 28, 2024. La imagen muestra dos fotografías de líquenes foliosos en una ramita de olmo. La foto superior se toma bajo luz diurna regular, mientras que la foto inferior se ilumina con una luz negra UV-A. **Fotografía del día:** * La ramita está cubierta con líquenes grisáceos verdosos. * Algunas áreas tienen manchas amarillas u naranja que se asemejan a pequeños puntos de pintura. **Fotografía de luz negra UV-A:** * Bajo la luz UV-A, el líquen blanco Teloschistes exilis brilla en rojo brillante, mientras que Parmotrema hypotropum brilla en un color coral vibrante. * La ramita y otros elementos de fondo aparecen oscuros o negros debido a su falta de fluorescencia bajo luz UV-A. **Comparación:** * En contraste con la foto iluminada por UV-A, la fotografía diurna no muestra colores fluorescentes en ninguna especie de líquen. – Spanish translation

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