I called this morning glory like flowers "The four o'clock flower" when I was young, because it usually bloom around afternoon 4 o'clock with a strong, sweet-smelling fragrance, the flowers last only 1-2 days, The single-seeded fruits are spherical, wrinkled and black upon maturity which children like to play with them.
The botanic name is Mirabilis jalapa . Mirabilis in Latin means wonderful and Jalapa is a town in Mexico. The flowers are available in many colors, a curious aspect of this plant is that flowers of different colors can be found simultaneously on the same plant. Different color variation can be found in the same flower.