Yellow Oleander is a dense, leafy, evergreen shrub or small tree up to 6 metres high with milky sap. The leaves are narrow, lance-shaped, bright green, glossy above and paler below. Flowers may vary from yellow to orange. They are trumpet-shaped and twisted in the bud. The fruit is drupe-like, slightly fleshy and bright green eventually hardening and turning black, broadly triangular in outline with a raised ridge across the middle. All parts of the plant are toxic.