A conspicuous medium to large leafy lichen, it is pale grey when dry and yellow green when wet. It has rounded lobes, measuring 3 to 8 mm wide, and these often have a wrinkled appearance, especially in older specimens, looking like molten wax.

Trunks of deciduous trees and on other, generally base-poor, substrates.

All year round.

Widespread and locally common, scarcer in central and northern Scotland.

Fairly frequent in Leicestershire and Rutland.