BigBill said:Keikies actually form from vegetative eyes. Under some conditions some become buds, under different conditions they become plantlets.
One school of thought is that nighttime temperatures that are too warm produce vegetative keikies.
The underground structure is NOT a pseudobulb, it is a rhizome. The upright canes on your plant that carry the flowers and leaves are the pseudobulbs. The connective tissue between adjacent pseudobulbs is called a rhizome. Nobile Dendrobiums do not produce extensive rhizomes.
They run along the surface of the media but do not produce roots ever as far as I can recall. Then the new growth, the new pseudobulbs, arise from the rhizome and the roots arise from the base of the pseudobulb.