Irish lichens

Ionaspis lacustris 		Order: Lecanorales       Family: Hymeneliaceae

Species: Ionaspis lacustris
Rusty brook lichen

Growth type crustose.
Photos: On acidic rocks. Ballingeary area, Cork, SW Ireland.

Smooth, slightly cracked cream to orange thallus. Apothecia are frequent, to 0.4mm in diameter. Discs +/- convex, translucent-pink when wet, deep orange when dry, concave becoming flat.

Occurs on inundated upland siliceous rocks, also on upland bridges and rocks in seepage tracks. Most frequent in western Ireland.
Chemical reactions negative.


Ionaspis lacustris


Ionaspis lacustris


Ionaspis lacustris
Ionaspis lacustris March 2009

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