Twig of elm tree with folious lichens Teloschistes exilis, Parmotrema hypotropum, Usnea strigosa 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

🎞️ #3610-16

The image shows a twig of an elm tree covered with folious lichens, which are small organisms that grow on the surface of plants and other substrates. The lichens are illuminated by both regular daylight and a 365 nm ultraviolet (UV-A) blacklight.

**Visual Description**

* **Twig of Elm Tree**: The twig is the main subject of the image. It appears to be a small branch from an elm tree, with rough bark and several leaves or buds visible.
* **Folious Lichens**: There are three types of lichens growing on the twig:
* **Teloschistes exilis**: This lichen has a pale yellow-green color and a delicate, hair-like appearance. It is growing in clusters along the length of the twig.
* **Parmotrema hypotropum**: This lichen has a bright orange-red color and a more robust, leafy appearance than Teloschistes exilis. It is growing in larger clumps on the twig, often overlapping with the other two types of lichens.
* **Usnea strigosa**: This lichen has a pale gray-green color and a long, stringy appearance. It is growing in thin strands along the length of the twig, often intertwining with the other two types of lichens.
* **Illumination**: The top half of the image shows the twig illuminated by regular daylight, while the bottom half shows the same twig illuminated by a 365 nm ultraviolet (UV-A) blacklight. The blacklight causes the lichens to fluoresce, making them appear more vibrant and colorful.

**Overall**

The image highlights the unique characteristics of folious lichens and their ability to thrive in various environments. The use of both regular daylight and UV-A blacklight illumination allows for a detailed examination of the lichens' structure and coloration. – AI vision

🇪🇸 Descripción en español / Spanish Description

Ramita de olmo con líquenes foliosos Teloschistes exilis, Parmotrema hypotropum y Usnea strigosa cuando se expone a la luz del día regular, así como cuando se ilumina con una luz negra ultravioleta (UV-A) de 365 nm desde una senda cercana al Birch Creek Unit de Somerville Lake State Park. Texas, 28 de agosto de 2024. La imagen muestra una ramita de olmo cubierta con líquenes, que son pequeños organismos que crecen en la superficie de las plantas y otros sustratos. Los líquenes están iluminados tanto por la luz del día regular como por una luz negra ultravioleta (UV-A) de 365 nm. **Descripción Visual** * **Ramita de Olmo**: La ramita es el tema principal de la imagen. Parece ser un pequeño ramal de olmo, con corteza gruesa y varias hojas o brotes visibles. * **Líquenes Foliosos**: Hay tres tipos de líquenes creciendo en la ramita: * **Teloschistes exilis**: Este líquen tiene un color verde amarillento pálido y una apariencia delicada, similar a un pelo. Está creciendo en grupos a lo largo de la longitud de la ramita. * **Parmotrema hypotropum**: Este líquen tiene un color rojo anaranjado brillante y una apariencia más robusta y foliosa que Teloschistes exilis. Está creciendo en grupos más grandes sobre la ramita, a menudo solapándose con los otros dos tipos de líquenes. * **Usnea strigosa**: Este líquen tiene un color verde grisáceo y una apariencia alargada, similar a un cordón. Está creciendo en hebras delgadas a lo largo de la longitud de la ramita, a menudo entremezclándose con los otros dos tipos de líquenes. * **Iluminación**: La mitad superior de la imagen muestra la ramita iluminada por la luz del día regular, mientras que la mitad inferior muestra la misma ramita iluminada por una luz negra ultravioleta (UV-A) de 365 nm. La luz negra hace que los líquenes fluoresezcan, lo que los hace aparecer más vibrantes y coloridos. **Conclusiones** La imagen destaca las características únicas de los líquenes foliosos y su capacidad para sobrevivir en diferentes entornos. El uso tanto de la luz del día regular como de la luz negra iluminada permite un examen detallado de la estructura y coloración de los líquenes. – Spanish translation

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