Ron,
Your plant and photographs are beautiful as always !
Can I ask you what criteria you are using to id your schoenorchis ? I have been looking for an id key without success...
I have one bought as S. fragrans, but I would like to know if it is really one.
With all the pictures on the web, all very different for the same name, it is hard to be sure ! A lot of pictures showing S. fragrans look more like the one you call S. seidenfadenii...
Here is mine (very different colors from yours) to compare (last year's bloom)