BioImages: The Virtual Field-Guide (UK)
||6 November 2006
|OS grid ref
||53° 10' N, 1° 50' W
||Vice County: Derby, VC57, England
|Stage or state
||on large limestone boulder, embedded in the ground
||Substrate: hard limestone.
Thallus: very pale bluish grey, areolate, with bluish marginal prothallus.
Apothecia: black, sunken, initially small sunken dimples, then pycnidia-like dots with radially cracking whitish margins, becoming stellate, finally more or less circular and pruinose.