Family: Verrucariaceae Species: Normandina acroglypta Growth type crustose. Photos: Over moss on Cordaline. Skibbereen, Co. Cork, SW Ireland. Identified by Brian Coppins The greyish-green thallus forms a diffuse crust over bryophytes on base-rich bark or rock or directly on base-rich bark. Concolorous, scattered soralia, soredia 20-40 µm diam. Asci are 8-spored, spores 5-7(-8) septate, 31-37(-39) × 6.5-8 µm. Micrograph below. Chemical reactions negative. Found overgrowing moss and liverworts on base-rich bark and rocks, or directly on bark. Widespread but infrequent in Ireland. Related: Normandina pulchella. Green, squamulose thallus

Micrograph

Normandina acroglypta May 2010