I agree, Red Porterweed (Stachytarpheta mutabilis) I used to have the red variety in a container but don't know what happened to it; I haven't seen it blooming since 2013 but I still have the Blue Porterweed (Stachytarpheta cayennensis) (which is invasive here in Florida) in a few of the beds. It's a butterfly magnet too but I miss the red variety.
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!