A native of Peru (also known as Marvel of Peru), one of the most fascinating things about Four o'Clocks is their ability to grow different colored flowers on the same plant. This particular variety ('Stars and Stripes') also boasts stripes and splashes as well as parti-colored blooms.
I do expect them to go on well to next year. They are known as tender perennials, but I once had a plant that sailed through several sub-freezing Midwest winters, so I am not sure what the actual cold hardiness might be! In any case, I expect them to last at least a few years here, where winter lows rarely drop much below freezing.
As the plants receive a fair amount of shade in the afternoon, I am getting to see the open flowers for longer periods -- especially now that the days are getting a bit shorter! They may actually be opening by four o'clock these days!