Silverleaf Fungus - Chondrostereum purpureum

A reflexed corticoid, with a pale hairy cap and smooth purplish fertile surface underneath.  It is very variable in appearance, and older dried specimens can be difficult to identify with certainty.  Fresh specimens are resupinate and usually more purple; as it ages it becomes paler, and browner.    It causes Silverleaf disease on the foliage of the Plum and Cherry family; leaves develop a silvery sheen before the whole branch dies back; the cut branches of affected trees show a darker stain in the centre.

Older specimens can look like a Stereum species or Laxitextum bicolor

If recording the fruiting bodies, photograph upper and lower fertile surface.  If recording silverleaf disease, photograph foliage and (if possible) a cut branch.  Always note host plant and substrate. 

Fruitbodes on dead deciduous wood, often appearing on the sawn ends of felled trunks.  Silverleaf disease mainly affects Prunus, but other garden trees and shrubs may be infected.

All year round.

Infrequent but widespread in Britain.

Occasional in Leicestershire and Rutland.

https://www.rhs.org.uk/disease/silver-leaf