Synonyms: Lobaria submarginale, Lobaria submarginalis, Parmelia epiclada, Parmelia michauxiana, Parmelia submarginalis, Parmotrema michauxianum.
Parmotrema submarginale is a foliose lichen species characterized by its pale gray to greenish-gray thallus, 3-8 cm in diameter, with lobes 1-3 mm wide. The lichen has a distinctive submarginal soralia and concolorous lower surface. In East and Central Texas, it typically grows on trees, particularly oak and cedar, in open woods and along woodland edges, often in areas with full sun to partial shade. It is commonly found on rough-barked trees, where its rhizines can anchor securely. The species is relatively common in the region, with a wide distribution across the eastern part of the state.
Ruffle lichen Parmotrema submarginale on an oak in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 12, 2019
23200 Park Rd, Washington, TX 77880, USA
Close up of ruffle lichen Parmotrema submarginale on an oak branch in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 12, 201923200 Park Rd, Washington, TX 77880, USA
Ruffle lichen Parmotrema submarginale(?) on a fallen oak branch at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019803 Lakeview Ln, Somerville, TX 77879, USA
Ruffle lichen Parmotrema submarginale on a fallen oak twig on Park Hudson Trail. Bryan, Texas, January 27, 20193061 Plaza Centre Ct, Bryan, TX 77802, USAObservations of Parmotrema submarginale in East and Central Texas reveal its presence on various oak species. In Washington, Texas, it was found on an oak tree at Washington-on-the-Brazos State Historic Site, with a distinctive ruffled appearance. A close-up view of the lichen on an oak branch showed its intricate details. Similar observations were made at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park, where it grew on a fallen oak branch. Additionally, the lichen was spotted on a fallen oak twig on Park Hudson Trail in Bryan, Texas. These sightings suggest that Parmotrema submarginale is widely distributed in East and Central Texas, often growing on oak trees or fallen branches, and can be identified by its characteristic ruffled morphology. The species appears to thrive in these regions, with multiple observations recorded in January 2019.
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