Rat Rani (Night Queen) Plant is an evergreen woody shrub growing to 4 metres (13 ft) tall. The leaves are simple, narrow lanceolate, 6–20 centimetres (2.4–7.9 in) long and 2–4.5 centimetres (0.79–1.77 in) broad, smooth and glossy, with an entire margin. The flowers are greenish-white, with a slender tubular corolla 2–2.5 centimetres (0.79–0.98 in) long with five acute lobes, 10–13 millimetres (0.39–0.51 in) diameter when open at night, and are produced in cymose inflorescences. A powerful, sweet perfume is released at night. The fruit is a berry 10 millimetres (0.39 in) long by 5 millimetres (0.20 in) diameter, the colour of an aubergine. There is also a variety with yellowish flowers. There are mixed reports regarding the toxicity of foliage and fruit.