Really? Thats cool. My chocolate mimosa is the only one iv seen in person its small and keeps dying back to the ground may not be as hardy as the green types I see around here some are very large. I have a southern Magnolia I planted a few years ago and has done well. Not sure of the variety maybe just a non cultivar seed grown tree. There are many southern magnolias planted down here and some of them are really big and old.

I think it would be neat to have a chocolate mimosa even as a die-back perennial.