Of course I cannot speak for Blackfoot, but here is what I understand happened from reading all over. I could be wrong here, but this is what I have gathered. I know that there were a number of unofficial released varieties bearing the name "improved Celeste". They were all an attempt to improve upon the Celeste, but were different cultivars. The O'Rourke was an official release that was another improved variety coming from Celeste's linage supposedly. The leaves have 5 lobes and 3 lobes, produces a fruit with a tight eye, amber flesh and a long neck, and it really looks nothing like Celeste. Out of the other "improved" Celeste varieties, there is one particular cultivar that seems to stand out. It is the one referenced above.