on the bark of fresh dead wood (a small Populus tremula)
On the dead branches of Robinia sp. (R. hispida/R. pseudoacacia)
On the dead branches of Robinia sp. (R. pseudoacacia/R. hispida)
On a fallen tree trunk
On a fallen trunk (without bark) of Pinus sylvestris.
on the bark of a fallen and rotten Populus tremula
On Aesculus hippocastanum