Four o'clocks (mirabilis Jalapa) are an old fashioned flower that bloom late in the afternoon. They have a wonderful fragrance. The ones in my yard are yellow, a dark pink color (fushia) and then I have bicolor with both colors on the same plant. They are tubers and I have dug up some as big as my arm. If you ever get some, be prepared to have them forever.
But they're pretty and easy - my kind of plants.