Haematomma accolens

Haematomma accolens, commonly known as the tree bloodspot, is a species of crustose lichen in the family Haematommataceae. It forms thin to moderately thick patches on tree bark, appearing yellowish-white to greenish-grey in colour, and features vivid red to deep reddish-orange spore-producing structures (apothecia). The lichen typically grows on the bark of deciduous trees in warm-temperate and subtropical regions, particularly favouring smooth-barked trees such as oaks and maples in shaded forest environments. Since its description by the Scottish botanist James Stirton in 1881, it has been found across the Southeastern United States, Central and South America, parts of Africa, India, Sri Lanka, China, and northeastern Australia, where it plays a role in forest ecosystems by contributing to nutrient cycling and providing microhabitats for small invertebrates....read more on Wikipedia.