I think both are right,
sometimes Hybrids are close to the original plants, and there is a big variation between this kinds.
The one from JPMC looks llike the one I am searching for, the moksin ones are you get often in europ, I think this is because the color is more nice.
dont know if for hank small they used mokasin or the normal type, but if you look in books the different is eomtimes not really clear, tehere are dark ones in the populations of the light ones, the same for pubescens.
Planipetalum I was thinking for a long time it has to be yellow, then I get told that this is not the fact, they have shorter steams and not so twisted.
But only my old plant is extremly twisted and the seedlings out of it which bloomed last year are smaller in flower and not all are so tiwsted, so I think the different is sometimes really close. The same for the hybrids, swa people selling pubescens and parviforum as calceolus and the way round. I hope that this year I will have some flowering seedlings which are for sure pure calceolus, the others I have I am not sure if they are from european origin, because not one is so dark like they have to be. So you see to separate is sometimes really not easy.
here is a link to Hank Small where it look like different
http://www.w-frosch.de/Cypris/Hybriden/emil.htm
Hope mien will flower this year too.