Arctoparmelia incurva

The thallus is foliose, yellow to yellow-grey, lobes narrow, crowded, radiating, convex in cross section, turned under at the tips, pale brown beneath, inner lobes usually bearing large, globose, white to yellowish soralia.

On hard, exposed, base-poor rocks.

All year round.

Mainly found in the north and west, and mainly in upland areas.

Status in Leicestershire and Rutland not known.