Thanks for all the great links Janet!
I have to go thoroughly through them, I've copied them all in my Orchid folder on a document. A lot to read and to study there! Jean's link with the list of all species occurring in the Rio state is very useful indeed..
I find it a pity I found so little in bloom the times I was there which are January-February (the months I most like to escape from the cold, wet and dark Belgium) and the Atlantic Forest is considered being so rich in them.
Of course many are growing epiphytic, too high up in the tree canopy to get a glimpse of possible blooms..if only I could be a bird..
I have quite some photos of just orchid foliage though, but I guess it is a hopeless task to find ID's for them..
I do think that orchids that are normally terrestrial can also grow on tree trunks because of the humidity level and the plant debris that accumulates on the trunks?