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...