Physcia neogaea is a crustose to foliose lichen species characterized by its gray to gray-brown thallus, often with distinctive black apothecia. In East and Central Texas, it typically grows on trees, particularly oak and cedar, as well as on rocks and soil. It prefers full sun to partial shade and can tolerate a range of substrate pH levels. The species is relatively common in the region, with sightings reported in areas such as the Edwards Plateau, the Post Oak Savannah, and the Piney Woods.
Dwarf rosette lichen Physcia neogaea or may be P. aipolia or P. pumilior on smooth bark of hackberry tree at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019
Dwarf rosette lichen Physcia neogaea on a dry pad of prickly pear cactus (Opuntia) in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Unnamed Road, Cedar Creek, TX 78612, USA
Dwarf rosette lichen Physcia neogaea on a dry pad of prickly pear cactus in prairie in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021Unnamed Road, Cedar Creek, TX 78612, USAObservations of Physcia neogaea in East and Central Texas reveal its presence on various substrates. On January 25, 2019, it was found on the smooth bark of a hackberry tree at Lake Somerville Trailway. Later, on March 17, 2021, it was observed growing on dry pads of prickly pear cactus in McKinney Roughs Nature Park near Austin, both in a nature park setting and in a prairie area. The lichen formed dwarf rosettes in all instances, suggesting an adaptation to the local environment. These sightings indicate that Physcia neogaea can thrive on different surfaces, including trees and cacti, in East and Central Texas. The species appears to be tolerant of varying conditions, allowing it to colonize a range of habitats in the region. Its growth patterns and substrate preferences are notable characteristics of this lichen species.
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