| Caloplaca cerina | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Teloschistales |
| Family: | Teloschistaceae |
| Genus: | Caloplaca |
| Species: | C. cerina |
| Binomial name | |
| Caloplaca cerina Ehrh. ex Hedwig | |
Caloplaca cerina, also known as the gray-rimmed firedot lichen, is a species of lichen. It is part of the monophyletic Caloplaca cerina species group and is the type species of the genus Caloplaca . [1]
Caloplaca cerina has a crustose thallus, typically dark grey to white. [1] It has a thalline margin , although this is sometimes thin and difficult to note. [2] However its appearance can be very variable; as a result, many specimens that have been identified as Caloplaca cerina are actually other species. One study that examined 3,000 specimens of Caloplaca cerina found that roughly 1,000 were other species. [2]
It is very common on tree bark, particularly on poplar and elm trees. [3]