A colleague asked for an ID on this. He said:

This is a hybrid hibiscus that looks Texas Star like but is not. Obtained at Color Spot in TX three years ago for LA and MS trials but was not labeled and was mixed in with other plants. Nobody at the nursery in TX or the folks in TX that know hibiscus can tell me what it is. Anybody know, Would be highly and greatly appreciative!

Anyone know? Maybe @Horntoad?

Hybrid Hibiscus moscheutos maybe 'Fireball'
http://www.garten.cz/a/cz/3645...

http://powellgardens.blogspot....

http://www.whatgrowsthere.com/...
Swamp Mallow 'Fireball' (Hibiscus moscheutos)
https://www.earlmay.com/tips__...

http://www.willowaynurseries.c...
http://www.willowaynurseries.c...

He is also called water hibiscus - Hibiscus moscheutos

It almost surely has H. coccineus in it and probably H. moscheutos, maybe even a little H. dasycalyx, but I doubt you are going to get a definitive cultivar name. I tried looking at Color Spot website and they don't even show species or cultivar names.
Definitely not 'Red Flyer', that is a H. coccineus, H. grandiflorus hybrid, with a leaf shape closer to grandiflorus.

I appreciate the responses. I'll pass them along.