Irish lichens

Order: Lecanorales       Family: Cladoniaceae

Species: Cladonia parasitica

Primary thallus squamulose, secondary thallus fruticose.
Photos: On conifer trunk. Ballingeary, Co. Cork, SW Ireland.
Correction: Photos probably immature C. polydactyla. JD

Thallus forms persistent compact mat of very small, incised, grey-green basal squamules, +/- isidiate. White lower surface with granular soredia. When present podetia are irregular, +/- coralloid-branched, furrowed and contorted, sorediate or with squamules. Small, clustered, brown apothecia. Pycnidia are brownish-black.

Infrequent on +/- decayed trunks, branches, stumps and logs. Usually found on oak, also on pines in old woodland, occasional on damp humus. Thallus K+ yellow, C-, KC-, P+ yellow, UV-

Similar C.squamosa, larger squamules and podetia, K-, UV+ white

December 2009

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