on the bark of fresh dead wood (a small Populus tremula)
On Acer sp.
On Acer or Fraxinus sp.
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 a fallen trunk of Betula pendula
on the bark of a fallen and rotten Populus tremula
On Aesculus hippocastanum