Order: Peltigerales       Family: Collemataceae Species: Leptogium cyanescens Growth type foliose. Photos: On rock and Ash trunk. Ballingeary, Cork, SW Ireland. Thin,papery thallus of over-lapping bluish-grey lobes, either +/- dispersed or forming patches. Rhizines are absent. Numerous flat or pin-like laminal isidia on upper surface, overlapping at centre. Apothecia very rare, spores becoming muriform, 19-23 x 7-9 µm. Usually found near water on rocks, trees and among moss. Chemical reactions negative.

Leptogium cyanescens February and October 2009