Wood for mounting

[Nicolasdperez]

Question: Are there any types of wood (besides those which are chemically treated or decomposing) that should be avoided for mounting orchids? Or does it not matter as long as the orchid can fasten itself to it?

Context: I recently purchased a baby sedirea japonica and am thinking about mounting it. There is a trail near my house with a lot of old tree branches which I will probably use to mount it. I would plan to submerge the wood in boiling hot water to get rid of any insects or harmful bacteria; and I would mount the orchid with AAA sphagnum moss and fishing line.

Thank you once again for your time and help