I am here in South Florida and have seen this plant growing at the local Living Color Garden Shop. It is not, however, one of the plants they sell. The clerk thought it was a Gomphrena, but having Googled gomphrenas I think that she is wrong. Can someone help me?
I think it may be Alternanthera dentata.
Ahhh.... The power of the internet. Thanks vngarden and spoonlegs for your responses. Spoonlegs, I believe you are right on. So great to have this identified. I'm rooting some cuttings now and even managed to collect some with roots in tact. I am a big fan of actually knowing what I have growing.
Thanks a million and have a great holiday season!