Calicium carolinianum
Calicium carolinianum is a species of lichen in the family Caliciaceae. It is endemic to the Gulf Coastal Plain region of the United States. The lichen contains norstictic acid, and has ascospores that measure 13–17 by 8–9 μm. Taxonomy. The lichen was originally described as "Acolium carolinianum" by American botanist Edward Tuckerman in 1872. He discovered it in South Carolina, after which the species is named. Leif Tibell transferred it to the genus "Thelomma" in 1976. In 2016, Maria Prieto and Mats Wedin proposed a transfer to the genus "Calicium", "until molecular investigations can clarify its position". Calicium