Rain-tree bark is cream-brown to grey-brown, smooth but thinly flaking in irregular patches on older wood. A beige or buff colour is exposed for some time in newly flaked patches. The bark exudes a sticky red sap when cut or otherwise damaged.

The main stem is tall and rarely quite straight, often with a twist or some curving. It becomes buttressed on large trunks. Coppicing may happen at the base (Coates Palgrave, 2002; Pooley, 1993).