Irish lichens
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Order: Incertae sedis Family: Arthrorhaphidaceae
Species: Arthrorhaphis grisea # Photographs on Baeomyces rufus. Ballingeary, Co. Cork, Ireland Whitish-grey to dark grey thallus is immersed in the host thallus, giving it a sickly, unhealthy appearance. Black sessile apothecia are rare, becoming disc-shaped with thick rims. Spores are acicular (needle-shaped), multi-septate with 5-11 septa, 45-65 × 2.5-5 µm. Often only the anamorph is present with abundant black pycnidia. Parasitic on Baeomyces rufus on acid soils and siliceous rocks, usually in upland areas. Arthrorhaphis aeruginosa turns Cladonia squamules blue-green |
Arthrorhaphis grisea. March 2009