Scrambling shrub with aerial roots. Leaflets 9-11, each long-pointed, to about 7 cm long and saw-toothed, hairy below, at least on the midrib. Flowers in clusters of up to 12, the more or less funnel-shaped corolla to 7 cm long, orange, the calyx shorttoothed and reaching to about one third of the length of the flower tube; summer. Capsule to about 10 cm long.
Less frequently grown are C. grandiflora (Thunb.) Schum. from Japan and China, and C. ×tagliabuana (Vis.) Rehder (C. grandiflora × C. radicans).They are distinguished by leaflet hair, and calyx-corolla length ratio (see key).
Source: (2002). Bignoniaceae. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.