Synonyms: Caloplaca squamosa, Placodium squamosum.
Squamulea squamosa is a crustose lichen species characterized by its squamulose thallus, composed of small, overlapping scales. In East and Central Texas, it typically grows on trees, particularly oak and cedar, and rocks in shaded to partially shaded areas. The thallus is usually grayish-white to pale brown, and the apothecia are rare, but when present, they are immersed to slightly raised and have a reddish-brown disc. It is often found in areas with high humidity and moderate temperatures.
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone at the road descent at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019
Lake Somerville Trailway, Somerville, TX 77879, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone outcrops in an oak and red cedar forest at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019Lake Somerville Trailway, Somerville, TX 77879, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) and other lichens on sandstone outcrops in an oak and red cedar forest at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019Lake Somerville Trailway, Somerville, TX 77879, USA
Crust of firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone outcrops in an oak and red cedar forest at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019Lake Somerville Trailway, Somerville, TX 77879, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on a horizontal surface of a tomb in Boonville Cemetery. Bryan, Texas, January 27, 20193504 Pioneer Cir, Bryan, TX 77808, USA
Details of firedot lichen Squamulea squamosa (Caloplaca squamosa) on a horizontal surface of a tomb in Boonville Cemetery. Bryan, Texas, January 27, 20193504 Pioneer Cir, Bryan, TX 77808, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) covering a horizontal surface of a tomb in Boonville Cemetery. Bryan, Texas, January 27, 20193506 Pioneer Cir, Bryan, TX 77808, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) in Old Independence Cemetery near Independence. Texas, February 10, 20198675 Coles Rd, Brenham, TX 77833, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) in City Cemetery. Bryan, Texas, March 3, 2019Unnamed Road, Bryan, TX 77803, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on a marble tomb in City Cemetery. Bryan, Texas, March 3, 2019Unnamed Road, Bryan, TX 77803, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis, Protoparmeliopsis muralis) with Squamulea squamosa (Caloplaca squamosa) on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019Park Rd 1-A, Bastrop, TX 78602, USA
Aspicilia(?) lichen with Squamulea squamosa (Caloplaca squamosa) on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019Park Rd 1-A, Bastrop, TX 78602, USA
Stonewall rim-lichen (Lecanora muralis, Protoparmeliopsis muralis) with Squamulea squamosa (Caloplaca squamosa) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019Park Rd 1-A, Bastrop, TX 78602, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) with apothecia on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019Park Rd 1-A, Bastrop, TX 78602, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019Park Rd 1-A, Bastrop, TX 78602, USA
Close up of firedot lichen Squamulea squamosa (Caloplaca squamosa) near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019Park Rd 1-A, Bastrop, TX 78602, USA
Apothecia of firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019Park Rd 1-A, Bastrop, TX 78602, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone outcrops at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2019Lake Somerville Trailway, Somerville, TX 77879, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, October 13, 2019Park Rd 1-A, Bastrop, TX 78602, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on a sandstone outcrop at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 26, 2020Lake Somerville Trailway, Somerville, TX 77879, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, February 23, 2020Park Rd 1-A, Bastrop, TX 78602, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone outcrops at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, April 5, 2020Lake Somerville Trailway, Somerville, TX 77879, USA
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, February 28, 2021Park Rd 1-A, Bastrop, TX 78602, USA
Lichen Squamulea squamosa (Caloplaca squamosa) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, December 25, 2021Trailhead, Scenic Overlook Trail, Bastrop County, Texas, 78602, United States
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, December 25, 2021Trailhead, Scenic Overlook Trail, Bastrop County, Texas, 78602, United States
Firedot lichen Squamulea squamosa (Caloplaca squamosa) at Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, February 14, 2024Lake Somerville Trailway, Lee County, Texas, United States
Firedot lichen Squamulea squamosa (Caloplaca squamosa) on a tomb in Independence Cemetery. Texas, March 26, 2024Washington County, Texas, United States
Orange apothecia of firedot lichen Squamulea squamosa (Caloplaca squamosa) on a tomb in Independence Cemetery. Texas, March 26, 2024Washington County, Texas, United States
Close-up of firedot lichen Squamulea squamosa (Caloplaca squamosa) on a tomb in Independence Cemetery. Texas, March 26, 2024Washington County, Texas, United StatesThe species of lichen Squamulea squamosa was observed in East and Central Texas from 2019 to 2024. The lichen was found on sandstone outcrops, tombs, and marble surfaces in various locations, including Lake Somerville Trailway, Bastrop State Park, and several cemeteries. Observations were made throughout the year, with multiple visits to some locations. The lichen was often found growing with other species, such as Stonewall rim-lichen and Aspicilia lichen. Apothecia, or fruiting bodies, were also observed on several occasions. The observations suggest that Squamulea squamosa is a common and widespread species in the region, able to thrive on a variety of substrates and in different environments. Overall, the data provide valuable information on the distribution and ecology of this lichen species in East and Central Texas.
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