What merits the difference between cultivar, var., and subspecies. I have bugged Barry Rice about this and other topic enogh today. I understand that:
cultivar is a individual plant with distinct charicteristics which merits a special name.
Subspecies shows a distinct difference in at least 2 populations (actually ranges) of one species.
Var.-is a distinct difference in two populations but not enought ot merit subspecies.
But my question is what did the recent U. reniformis cultivars get cultivar instead of var.?
Why is D. capensis seperated into var. or cultivars instead of subspecies?
Since S. rosea and S. purpurea ssp. venosa var burkeii are the same why can it not become S. purpurea ssp. rosea (or burkeii)? Or the same with var. montana?
I guess my question is what distinguishes the three groups? I ahve researched but not come up with any reasonable answer.