Order: Arthoniales       Family: Roccellaceae Species: Inoderma subabietinum (Lecanactis subabietina) Growth type crustose Photos: On Holly. Glengarriff, Co. Cork, SW Ireland. Thin whitish-grey thallus with abundant globose, white-pruinose, black pycnidia, often with extruded yellowish conidial mass. Apothecia unknown. Found on the dry, shaded side of trunks and bases of old Oaks and other acid-barked trees. Also found on thick Ivy stems. Pycnidial pruina K+/- light yellow, C-, UV+ ice-blue, K/UV+ mauve Similar: Lecanactis abietina, pruina C+ red, Opegrapha vermicellifera, all chemical reactions negative

Inoderma subabietinum (Lecanactis subabietina) . May 2012