Physcia erumpens is a crustose to foliose lichen species characterized by its grayish-green thallus, lobes 0.5-2 mm wide, and apothecia that are immersed to slightly raised. In East and Central Texas, it typically grows on trees, shrubs, and rocks, often in shaded to partially shaded areas with moderate to high humidity. It is commonly found on species like Quercus, Ulmus, and Carya, and can tolerate a range of substrates, including bark, wood, and stone. The species is relatively widespread in the region, but its distribution can be patchy due to variations in microclimate and substrate availability.
Rosette lichen Physcia erumpens(?) on a tree on Alligator Branch section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville. Texas, February 17, 2019
Lone Star Hiking Trail, Huntsville, TX 77340, USA
Rosette lichen Physcia erumpens(?) on tree bark on Alligator Branch section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville. Texas, February 17, 2019Lone Star Hiking Trail, Huntsville, TX 77340, USAObservations of Physcia erumpens in East and Central Texas reveal its presence on trees in the region. On February 17, 2019, specimens were found on a tree on the Alligator Branch section of the Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas. The lichen formed rosettes on the tree's surface. Similar observations were made on tree bark in the same area, with Physcia erumpens(?) growing in a rosette pattern. These sightings suggest that Physcia erumpens is able to thrive on various substrates, including tree trunks and branches, in the forests of East and Central Texas. The species appears to be adapted to the local environment, allowing it to colonize and grow on available surfaces. Further study could provide more insight into its ecological role in the region. Habitats with suitable conditions support growth of this lichen species.
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