Synonyms: Dermatocarpon garovaglii, Dermatocarpon garovaglioi, Dermatocarpon glomeruliferum, Dermatocarpon lachneum, Dermatocarpon pusillum, Dermatocarpon sorediatum, Dermatocarpon trapeziforme, Endocarpon adnatum, Endocarpon garovaglii, Endocarpon garovaglioi, Endocarpon glomeruliferum, Endocarpon hedwigii, Endocarpon schaereri, Endocarpon sorediatum, Endocarpon subnitens, Endocarpon subscabridulum, Endocarpon subscabriusculum, Endocarpon tapeziforme, Endocarpon trapeziforme, Endopyrenium garovaglii, Endopyrenium garovaglioi, Endopyrenium pusillum, Endopyrenium trapeziforme, Leightonia pusilla, Lichen hedwigii, Lichen trapeziformis, Placidium pusillum, Placidium trapeziforme, Polyblastia garovaglii, Polyblastia garovaglioi, Polyblastia glomerulifera, Verrucaria adnata, Verrucaria garovaglii, Verrucaria garovaglioi, Verrucaria sorediata, Verrucaria subscabridula, Verrucaria trapeziformis.
Common names: Scaly Stippled Lichen, soil stipplescale.
Endocarpon pusillum is a crustose lichen that grows on calcareous rocks, tree trunks, and soil. In East and Central Texas, it typically forms small, circular to irregular patches, 1-5 cm in diameter, with a thin, greyish-white to pale brown thallus. The lichen's areoles are often indistinct, and its apothecia are rare, but when present, they are immersed and have a reddish-brown disc. It is commonly found on limestone outcrops, cedar elm trees, and soil in areas with low to moderate vegetation cover.
Scaly stippled lichen (Endocarpon pusillum) on a thin layer of soil over exposed limestone rocks overgrown by prickly pears near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
23668 FM 1155, Washington, TX 77880, USA
Dark crust of scaly stippled lichen (Endocarpon pusillum) on a thin layer of soil over exposed limestone rocks overgrown by prickly pears in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 201923668 FM 1155, Washington, TX 77880, USA
Scaly stippled lichen (Endocarpon pusillum) on a thin layer of soil over exposed limestone rocks overgrown by prickly pears near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 18, 202023668 FM 1155, Washington, TX 77880, USA
Close-up of scaly stippled lichen (Endocarpon pusillum) on a thin layer of soil over exposed limestone rocks overgrown by prickly pears near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 18, 202023668 FM 1155, Washington, TX 77880, USA
Scaly stippled lichen (Endocarpon pusillum) on a thin layer of soil over exposed sandstone rocks in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 202023668 FM 1155, Washington, TX 77880, USA
Dried scaly stippled lichen (Endocarpon pusillum) with moss on sandstone rocks in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 202023668 FM 1155, Washington, TX 77880, USA
Caloplaca together with a black lichen Endocarpon pusillum on a sandstone rock in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 202023668 FM 1155, Washington, TX 77880, USA
Caloplaca and a lichen Endocarpon pusillum on a sandstone rock in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 202023668 FM 1155, Washington, TX 77880, USA
Sandstone rock with Caloplaca and Endocarpon pusillum lichens in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 202023668 FM 1155, Washington, TX 77880, USAIn East and Central Texas, specifically at the Washington-on-the-Brazos State Historic Site, observations of the scaly stippled lichen (Endocarpon pusillum) revealed its presence on thin layers of soil over exposed limestone and sandstone rocks. The lichen was often found in areas overgrown by prickly pears, near former ponds, and on rocky outcrops. It formed dark crusts or scaly patches, sometimes co-occurring with other lichens like Caloplaca. The species was observed in various states, including dried and moist forms, and was able to grow on both limestone and sandstone substrates. The observations spanned several months, from December 2019 to March 2020, suggesting that Endocarpon pusillum is a relatively common and adaptable species in this region. Its ability to thrive on different rock types and in varying conditions highlights its ecological flexibility.
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