Species introCountry intro
Dermatocarpon luridum
Dermatocarpon luridum on wet rocks (basalt) in the splash zone along the Brule River in northern Minnesota. Dermatocarpon luridum is tolerant of occasional submerging under water and grows on rocks along freshwater river and lake margins.
"Dermatocarpon luridum is a common species in seepages and brooks in the temperate zone of both Europe and North America." http://lichenportal.org/portal/taxa/index.php?taxon=56440
Dermatocarpon luridum and the other members of the genus Dermatocarpon are commonly called stippleback lichens because they have fruiting structures called perithecia that are flask-shaped structures embedded in the nonfruiting body (thallus), with a hole in the top to release spores, causing an appearance of being covered with small black dots.
Thallus a mat of multiple lobes up to approx. 15mm in width, grey or pale to dark brown, lacking pruina, bight green when wet, lobes lacking.. more
