Description: Primary thallus crustose, grey, white or pale pinkish, thick, areolate, usually with soft, rounded, paler, more or less shiny, warty schizidia (1 mm diam.), most abundant in sterile thalli. Areolae convex, contiguous. Apothecia frequent, globose also when young, pink, 1-4 mm broad, emarginate or with a narrow margin, brought on erect, subfruticose, smooth, white stipes (podetia), 2-5 mm tall and to 3 mm wide. Hymenium I+ pale blue (reaction ephemeral!); hypothecium colourless; paraphyses simple, not anastomosing, only slightly thickened above. Asci 8-spored, unitunicate, cylindrical, thin-walled, slightly thickened above, I+ blue, the tip I+ deep blue. Ascospores hyaline, mainly 1-celled (some 2-celled), fusiform, 10-26 x 2-3 µm. Pycnidia immersed in warts, mostly laminal. Conidia shortly bacilliform. Photobiont chlorococcoid. Spot tests: thallus K+ yellow, C-, KC+ yellow, P+ yellow to orange, UV+ orange; medulla P+ yellow to orange, UV+ orange. Chemistry: baeomycesic acid, and variable amounts of squamatic acid and atranorin.
Note: on humid, disturbed clay soil, often in Calluna-heaths, most frequent in upland areas. For further details see Gierl & Kalb (1993).
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris