"Nyctanthes arbor-tristis" is a shrub or a small tree growing to tall, with flaky grey bark. The leaves are opposite, simple, long and 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 bilobed, flat brown heart-shaped to round capsule diameter, each lobe containing a single seed.