Synonyms: Trypethelium eluteriae, Trypethelium exocanthum, Trypethelium virens.
Common name: Speckled Blister Lichen.
Viridothelium virens is a crustose lichen species characterized by a greenish-gray to yellowish-green thallus, often with a powdery or granular appearance. It typically grows on bark, wood, and rock surfaces. In East and Central Texas, V. virens has been found on a variety of substrates, including oak and cedar trees, as well as sandstone and limestone rocks. The species is relatively common in the region, particularly in areas with high humidity and shaded conditions, such as along streams and in wooded areas.
Speckled blister lichen Trypethelium virens (Viridothelium virens) on atree in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, February 1, 2019
Lone Star Hiking Trail, Coldspring, TX 77331, USA
Tree lichen Trypethelium virens (Viridothelium virens) forming yellowish-brown and olive warts in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, January 19, 2020Lone Star Hiking Trail, Coldspring, TX 77331, USAObservations of Viridothelium virens in East and Central Texas reveal its presence on trees in the region. In the Big Creek Scenic Area of Sam Houston National Forest, the species was found growing on a tree, forming distinctive speckled blisters, as observed on February 1, 2019. Further observations on January 19, 2020, showed the lichen forming yellowish-brown and olive-colored warts in the same area. These growths are characteristic of Viridothelium virens, indicating its ability to thrive in the local environment. The species' appearance varies, with some specimens displaying a more vibrant green color, while others exhibit duller tones. Overall, these observations highlight the presence and variability of Viridothelium virens in East and Central Texas, specifically within the Sam Houston National Forest. The lichen's growth patterns and colors provide valuable insights into its biology and ecology in the region.
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