The Red cultivar I had 25 or 30 years ago was called El Capitolio Red Poodle . From what I have read, the first El Capitolio Hibiscus plants were from Cuba, and were thought to be a cross or H rosa-sinensis and H schizopetalus.
I got it at Lowe's on Memorial in Port Arthur. It was the only one like that was blooming and there were none with a tag for that variety. They did have a few others varieties. I picked up three different ones.