Order: Agyriales       Family: Agyriaceae Species: Placopsis lambii Growth type crustose, placodioid. Photos: On upland rock. Gougane Barra and Ballingeary, SW Ireland Shiny pinkish-white or greyish thallus with radiating marginal lobes. The variable brownish cephalodia are sometimes absent. Concentric blackish-brown or greenish soralia. Apothecia with flat pink or yellowish discs with thick margins. Occurs on damp, siliceous, upland rocks, frequently by streams or lakes. Often associated with metal-rich sites. Thallus C+ red. Similar: Placopsis gelida is very similar but most records probably refer to P. lambii. Trapelia placodioides lacks cephalodia

Placopsis lambii August and October 2009