The naming in Savage Garden was just something the author did to keep track of the different varieties he grew. I don't think there's anything formal to it. Best you can do with most moranensis is make sure you get the location data, but that is often impossible to find.
I have a half dozen moranensis varieties that have variously been described to me as A,B, G, caudata, Pachuca, 'purple flower', rosei and alba. I still call them that so I can keep track of them, but they aren't really formal or recognized names. Half of them have distinct characteristics (white flower, red leaves, longer veined leaves), but the other half can all look the same depending on the time of year and the age of the plant.
Anyway, your plant will probably grow over 4" across. I've found rosei, alba and the purple flowered variety stay small at 3" or less and some of the others can get 6" across or larger.
