TY, well said. That was my thought but I'm sure my ability to search for confirmed cultivar names is not top level.
If one uses a common name as a cultivar name, it completely loses its' distinction, so it would be strange for someone to choose to name their cultivar that way. "Here's a new kind of purple heart. It's called 'Purple Heart.'" ?? And purpurea is as suspicious from being a former species name when the genus was Setcreasea. Of course I don't know even most plants but have never seen a cultivar name that was the same as the species, current or past.
