On deciduous trees in forests (e. g. Fagus) and in exposed conditions (on Prunus spinosa).

Belgium: Ard.: RRR (†1890).

Luxembourg: Ard.: RRR (1986), Lorr.: RRR (1978).

France: - .

The specimens reported by La66: 459-460 either refer to U. silesiaca or to U. subfloridana.

Lit.: L8: 84-85.