The Pentalinon luteum (Wild Allamanda, Hammock Viper's-Tail) is a sun-loving vine that grows at coastal areas and rock pinelands in Florida and the Carribean. Its synonym is Urechites lutea.
This variegated form is even more attractive with its healthy lime green, white and yellow variegation on its leaves. Yes, it looks so so healthy without a speck of pest or disease problems.
In comparison, the flowers are not as conspicuous. I would grow it even without its flowers.