Nyctanthes arbor-tristis (Night-flowering Jasmine) is a species of Nyctanthes, native to southern Asia, from northern Pakistan and Nepal south through northern India and southeast to Thailand.
It is a shrub or a small tree growing to 10 m tall, with flaky grey bark. The leaves are opposite, simple, 6-12 cm long and 2-6.5 cm broad, with an entire margin. The flowers are fragrant, with a five- to eight-lobed white corolla with an orange-red centre; they are produced in clusters of two to seven together, with individual flowers opening at dusk and finishing at dawn. The fruit is a flat brown heart-shaped to round capsule 2 cm diameter, with two sections each containing a single seed.