Synonyms: Parmelia livida, Parmelia osseoalbida.
Common name: wrinkled loop lichen.
Hypotrachyna livida is a foliose lichen species characterized by its pale green to grayish-green thallus, with lobes 2-5 mm wide, and a medulla often stained brown. In East and Central Texas, it typically grows on trees, particularly oak and elm, in shaded areas with high humidity. The species is commonly found in the region's deciduous forests, where it can form dense colonies on trunks and branches. Its distribution in the area is widespread, but more frequently encountered in the eastern parts of the region, where the climate is more humid.
Wrinkled loop lichen (Hypotrachyna livida) on a fallen oak branch in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, January 5, 2019
Lone Star Hiking Trail, Coldspring, TX 77331, USA
Wrinkled loop lichen (Hypotrachyna livida) on yaupon in Lick Creek Park. College Station, Texas, January 6, 2019Yaupon Loop, College Station, TX 77845, USA
Wrinkled loop lichen (Hypotrachyna livida) on yaupon holly in Lick Creek Park. College Station, Texas, January 18, 2019
Wrinkled loop lichen (Hypotrachyna livida) in Lick Creek Park. College Station, Texas, January 18, 2019
Wrinkled loop lichen (Hypotrachyna livida) in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, February 1, 2019Lone Star Hiking Trail, Coldspring, TX 77331, USA
Wrinkled loop lichen (Hypotrachyna livida) on an oak(?) in Lick Creek Park. College Station, Texas, February 20, 2019Iron Bridge Trail, College Station, TX 77845, USA
Wrinkled loop lichen (Hypotrachyna livida) on a tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville. Texas, March 2, 2019Lone Star Hiking Trail, Montgomery, TX 77356, USA
Wrinkled loop lichen (Hypotrachyna livida) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville. Texas, March 2, 2019Lone Star Hiking Trail, Montgomery, TX 77356, USA
Patch of wrinkled loop lichen (Hypotrachyna livida) on a tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Wrinkled loop lichen (Hypotrachyna livida) on tree bark on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Wrinkled loop lichen (Hypotrachyna livida) on a recently fallen oak on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, December 26, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USAObservations of Hypotrachyna livida in East and Central Texas show that the species is widely distributed across the region. It was found on various substrates, including fallen oak branches, yaupon holly, and tree bark, in locations such as Big Creek Scenic Area, Lick Creek Park, and Sam Houston National Forest. The lichen was observed during different times of the year, from January to March, and again in December, suggesting that it is present throughout the year. Multiple sightings were recorded on the Lone Star Hiking Trail, specifically on the Caney Creek section, indicating a strong presence in this area. The species was also found on recently fallen oak trees, suggesting that it can colonize new substrates quickly. Overall, Hypotrachyna livida appears to be a common and adaptable species in East and Central Texas.
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