This is Nyctanthes arbor-tristis, also known as Tree-of-Sorrow, parijat, Tree of Sadness, Coral Jasmine, and Night-flowering Jasmine. This plant has fragrant beautiful flowers which open at dusk and finish at dawn. These flowers are also used to make a yellow dye for clothing. This is the official flower for the state of West Bengal, India. This plant appears in many Hindu religious stories. It likes to grow in full sun to partial shade where it blossoms from late Spring until the middle of the Fall. USDA Hardiness Zones 10 to 11.