Umbilicaria cylindrica

Foliose lichen.
The thallus is attached at central point, and is divided into multiple lobes.The colour is grey to brownish-grey above, lacking isidia. The lower surface is pale brown, with variable complement of often flattened, pale rhizinomorphs (non-attaching rhizines). The margins are lobular with variable development of fringing, grey-brown cilia. Apothecia are black, somewhat raised, discs with multiply infolded margins (gyrose).