Steve, that is very interesting, and it adds a new element to the 'Orchidglade' debate. I'm no one to doubt what Alan Koch says, but on the other hand, the taxonomy of 'Orchidglade,' has been in question for many years. In seeing pictures of the plant, I saw that it has very elongated pseudobulbs that look more like dolosa than walkeriana.
The mystery lingers on -- meanwhile, in reviewing my notes, I see that I was not quite accurate in regard to the origin of 'Pendentive.' It was not the direct result of a selfing, but of a cross between siblings of the selfing, as in your post "(which later produced Pendentive").
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