Thunbergia alata is a soft, perennial climber about 1-5 x 1 m with many twining stems. The leaves are heart- or arrow-shaped, softly hairy and sometimes toothed. Many flowers are borne singly in leaf axils with a small calyx enclosed in 2 large, ridged bracts. The corolla is obliquely trumpet-shaped and is usually bright yellow to deep orange. The fruit is like a bird’s head with a spherical base and a long ‘beak’. This plant flowers all summer but can continue all year in warmer areas.