Eric, either name, the plant looks like an excellent one to have in any collection. I wouldn't mind having it.
Bob is true in his comments. I believe that the ethics in some nurseries to supply "correctly" named plants has gone out the door. The knowledge of "true" species unfortunately has been lost to a greater extent with the passing of the people who knew what was what. Many of them never documented or photographed their plants, if they did then they have been lost to who knows where. There are some very knowledgable species experts around including taxonomists that have highlighted many faults in the species being grown today as to being something that they are not or influenced by another 'like species' in their make up. This just highlights the problem that we now all face and that is, "are the species we now grow, species or a form of hybrid?" Bob has already indicated that what he bought as species are now hybrids. The same problem is now occuring with P.Conco-bellatulum and P.wenshanense. Many nurseries are changing their Conco-bells to wenshanense when they are actually a man made hybrid where as wenshanense is "???" a natural hybrid found in the wild. The RHS registration book, is by the current examples of 'doubtful' species parents, as in Bobs glanduliferums if used by another nursery in breeding, would produce flowers somewhat different to the ones produced with the genuine thing. Bob, I believe, is honest enough to recognise this and not sell plants under a false pretext of being a true species. Shame many others aren't.