Synonyms: Anaptychia adamesii, Anaptychia heterochroa, Anaptychia hypoleuca, Anaptychia obscurata, Heterodermia speciosa, Physcia obscurata.
Common names: orange-tinted fringe lichen, Obscure Shield Lichen.
Heterodermia obscurata is a foliose lichen species characterized by its small to medium-sized thalli with rounded lobes, upper surface grayish-brown to dark brown, and lower surface pale brown to white. In East and Central Texas, it grows on trees, shrubs, and rocks, typically in shaded to partially shaded areas with high humidity. It is often found in association with other lichen species, such as Cladonia and Parmotrema, and can be locally common in areas with suitable substrates and microclimates.
Orange-tinted fringe lichen (Heterodermia obscurata) on an oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville. Texas, January 26, 2019
Lone Star Hiking Trail, Montgomery, TX 77356, USA
Orange-tinted fringe lichen (Heterodermia obscurata) on a tree 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 Heterodermia obscurata in East and Central Texas indicate that the species can be found growing on trees, specifically oak and other unidentified tree species. The lichen has been spotted in the Sam Houston National Forest near Huntsville, with sightings recorded on the Caney Creek and Alligator Branch sections of the Lone Star Hiking Trail. The observations were made during the winter months, with one sighting on January 26, 2019, and another on February 17, 2019. In both cases, the lichen displayed its characteristic orange-tinted fringe, allowing for identification as Heterodermia obscurata. These findings suggest that the species is present in the region's forests, where it can be found growing on tree bark. The observations provide insight into the habitat and distribution of Heterodermia obscurata in East and Central Texas.
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