Well, I'm confused
I've checked Jay Pfahl's site. He says that D. dickasonii is a miniature plant and decribes D. unicum as a miniature plant. I've certainly grown several D. unicums over the years, and a few years ago deflasked and sold a load of unicums. I've never had a unicum as large and certainly never as floriferous. D. dickasonii I've never grown before, so I have nothing to compare it with. visually, it doesn't look like unicum to me, size-wise.
Having said that, I see that the photographs on Jay's site has D. dickasonii with non-resupinate flowers, the plant photograph is upside down, while unicum flower is resupinate. The unicum flower is strongly recurved while the dickasonii isn't. Flower markings look the same to me, with dickasonii flowers being a bit fainter in markings on the lip. Jay says the flowers on dickasonii are between 2" and 2.4" and unicum flowers are 1.5" to 2". I measured one of my flowers which is about to reflex (still has petals sepals straight out, and it measures 2.2" straightening out a flower which has set in the recurve measures 2.2" so no difference there.
In conclussion, my confussion arises because my plant and flowers definately show characteristics of both D. unicum and D. dickasonii. Seeing that Jay decribes D. dickasonii as a miniature, then I'm going to assume that the current flowering cane is abnormally sized, seeing as it is only the plants second cane. It does seem a huge jump in size. we shall see what the next growth does. Miniature is supposed to be under 6" tall mine is definitly slightly over 8" by a couple of mm. It seems a mad jump for a plant to produce a 1" cane then suddenly exceed it's maximum size by two inches on it's second cane without some sort of artificial help.
You've caused me a problem, Ron, now I have to get my old butt out of the PC chair and do some in depth reading and studying. A question mark is now on the label.