Irish lichens
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Order: Incertae sedis Family: Fuscideaceae
Species: Fuscidea lygaea Photos: On acidic rock. Gougane Barra, Cork, SW Ireland. Specimen left and immediately below identified by John Douglass Variable. Pale to dark greyish-brown or brown thallus, often purple-tinged. Thin, +/- even, smooth and continuous or +/- cracked into minute areoles. Prothallus is dark brown to black. Black apothecia with flat discs that become convex, excluding margins. Common on hard, siliceous, upland rocks, most frequent in western and northern Ireland. Chemical reactions negative. Similar: Fuscidea cyathoides. K+ dirty yellow, UV- Fuscidea kochiana. UV+ blue-white. |
Fuscidea lygaea. August 2009