Nyctanthes arbor-tristis

Nyctanthes arbor-tristis is a species of tree belonging to the olive family, native to South Asia and Southeast Asia.
It reaches up to 10m in height.
Leaves green, opposite, single.
Flowers gathered in clusters, petals white, orange center. Strongly scented. They open at dusk and close at dawn.
Fruit is a round, brown, flattened capsule containing 2 seeds.