Order: Peltigerales Family: Collemataceae
Species: Collema fasciculare
Photos: Killarney National Park, Co. Kerry, SW Ireland.
Identified by John Douglass
Thallus forms small pulpy cushions, very swollen and easily loosened when wet. Lobes often indistinct, short, wrinkled, sometimes lobulate. Apothecia are abundant and often cover the thallus with flat discs, the margins thick and +/- wrinkled.
Occurs among moss on trunks of mature trees, usually Ash and Hazel, in western oceanic woodlands. Chemical reactions negative.
Collema fasciculare November 2009