Extract from Wikipedia article: Lecanora muralis is a waxy looking, pale yellowish green crustose lichen that usually grows in rosettes radiating from a center (placoidiod) filled with disc-like yellowish-tan fruiting bodies (apothecia). It grows all over the world. It is extremely variable in its characteristics as a single taxon, and may represent a complex of species. The fruiting body parts have rims of tissue similar to that of the main nonfruiting body (thallus), which is called being lecanorine. It is paler and greener than L. mellea, and more yellow than L. sierrae. In California, it may be the most common member of the Lecanora genus found growing on rocks (saxicolous).
Stonewall rim-lichen (Lecanora muralis) on a horizontal surface of a tomb in Calvert Cemetery. Calvert, Texas, January 8, 2019 608 Hanna St, Calvert, TX 77837, USA
Stonewall rim-lichen (Lecanora muralis) in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019 Unnamed Road, Round Mountain, TX 78663, USA
Stonewall rim-lichen (Lecanora muralis) with caloplaca on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) with Caloplaca squamosa on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Apothecia of stonewall rim-lichen (Lecanora muralis, Protoparmeliopsis muralis) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Close up of stonewall rim-lichen (Lecanora muralis, Protoparmeliopsis muralis) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis, Protoparmeliopsis muralis) with Caloplaca squamosa on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Rosette lichen (Physcia) with Lecanora muralis on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Patch of rosette lichen (Physcia) with Lecanora muralis on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Patch of stonewall rim-lichen (Lecanora muralis) on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Diploschistes actinostomus and stonewall rim-lichen (Lecanora muralis) on a sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Close up of stonewall rim-lichen (Lecanora muralis) on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Diploschistes actinostomus together with stonewall rim-lichen (Lecanora muralis) on a sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Diploschistes actinostomus(?) and Lecanora muralis together with other lichens near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) on Caloplaca on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) on sandstone at Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, October 13, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) on sandstone bench at Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, October 13, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) with caloplaca on sandstone in Bastrop State Park. Bastrop, Texas, October 13, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Texture of stonewall rim-lichen (Lecanora muralis) on sandstone bench at Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, October 13, 2019 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) on a sandstone rock at an overlook point in Bastrop State Park. Bastrop, Texas, February 23, 2020 Park Rd 1-A, Bastrop, TX 78602, USA
Texture of stonewall rim-lichen (Lecanora muralis) on a sandstone rock at an overlook point in Bastrop State Park. Bastrop, Texas, February 23, 2020 Park Rd 1-A, Bastrop, TX 78602, USA
Close-up of stonewall rim-lichen (Lecanora muralis) on a sandstone rock at an overlook point in Bastrop State Park. Bastrop, Texas, February 23, 2020 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) on sandstone bench near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, February 28, 2021 Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis) among Acarospora on sandstone bench near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, February 28, 2021 Park Rd 1-A, Bastrop, TX 78602, USA
Apothecia of stonewall rim-lichen (Lecanora muralis) on sandstone bench near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, February 28, 2021 Park Rd 1-A, Bastrop, TX 78602, USA
Close-up of stonewall rim-lichen (Lecanora muralis) on sandstone bench near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, February 28, 2021 Park Rd 1-A, Bastrop, TX 78602, USA