Order: Lecanorales       Family: Bacidiaceae Species: Squamarina cartilaginea Growth type squamulose. Photos: Inland on calcareous rock. The Burren, Co. Clare, Ireland Variable, thallus of pale yellow-green to brown-green squamules, +/- pruinose, forming loose or tightly overlapping crusts. Apothecia with brown to red-brown flat or concave discs that become irregularly convex with margins +/- excluded. Scattered, mainly coastal distribution in Ireland in crevices in limestone cliffs and on hard calcareous rocks, mosses and soil. Two chemotypes occur. Morphs with P+ yellow medulla appear confined to coastal sites, morphs with P- medulla also occur inland.

Squamarina cartilaginea July 2009