And then on the other side of the spectrum we have the Ionopsis utricularioides.
http://forum.theorchidsource.c...
People have commented on this one that it behaves like an annual in their collection. It did for me....
I could easily imagine a Vanda growing upwards a tree and in the process the lower part would die off as the plant
adds new growth on top and roots along the main-stem to hold on. ( and we scratch our heads why we lost the lower leaves)
One could visualize many creeping Orchids behaving that way.