Fast growing, extremely robust, evergreen climber. Leaves ovate to 15 cm long. Flowers paired, the floral tubes to 15 cm or more long, yellow, becoming orange-red; early summer. By far the largest and most attractive of the climbing species but a vigorous grower needing plenty of space.

China, SE Asia

Source: Spencer, R. (2002). Caprifoliaceae. In: Spencer, R.. 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.