Tradescantia pallidas (purple heart/purple queen):
http://garden.org/plants/searc...
The entry for 'Purple Heart' shouldn't be punctuated as a cultivar. There's no record of a that name being a cultivar that I've been able to find, just the most common common name for it.
'Pale Puma' looks like T. cerinthoides to me.
Inch Plant (Tradescantia cerinthoides)
T. spathacea (oyster plant) used to be called Rhoeo spathacea, the name has been changed. It has some cultivars:
http://garden.org/plants/searc...
I haven't experimented with oyster plant but purple heart, WJ (T. zebrina,) plain green WJ (T. fluminensis,) and T. cerinthoides are hardy here. Somewhere around Z7/8 border is prob the limit for them, where the ground starts to freeze. Bummin' to hear about Cheryl's lack of success with trying, 'cuz oyster plant isn't happy when brought inside my house for winter either. But, it's not been that enjoyable to have around in general, never recovering its' former glory after I removed & shared a bunch of side branches in 2012 or 13.
