Irish lichens
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Order: Lecanorales Family: Megalosporaceae
Species: Megalospora tuberculosa Photos: Glengarriff woods, Co. Cork, SW Ireland. Identification confirmed by John Douglass Soft, powdery-granular yellowish or pale grey-green thallus. Prothallus blue-black or absent. Granules disintergrate to form irregular clusters of blue-grey or yellowish-grey soralia, +/- covering thallus. Apothecia very rare, discs chestnut-brown with persistent, thin margins. Thallus K+ pale yellow, C-, KC+ yellow, P-, UV-. Host to Skyttea megalosporae. Found on well-lit, broad-leaved trees (especially Oak, Ash, Beech) in sheltered, humid, long-established woodlands. Often confused with Megalaria pulverea |
Megalospora tuberculosa. November 2009