Species: Peltigera hymenina
Photos: Among moss on acid rock. Ballingeary, Cork, SW Ireland.
Smooth, +/- shiny lobes with ascending margins are grey-brown, becoming greenish-brown when wet. The underside is cream to light brownish with faint, flattened veins and simple rhizines with tufted tips. Abundant erect, reddish-brown apothecia on the ascending lobes, usually longer than broad. Asci are 8-spored, spores colourless, 3-7 septate, 65-80 x 4-5 Ám. Micro photos below.
Common on acid rock and soil, tree stumps, peat, sand. Often occurs among short grass. Chemical reactions negative.