Deciduous climber. Leaves opposite, 10-15 cm long, 7-9 cm wide, lower surface waxy-blue and hairy. Flower clusters terminal, 20 cm or more wide. Flowers white, the thin-stalked bract to 4 cm long and creamy white.

Japan, Korea

S. integrifolium Oliver from S and C China and Japan is also occasionally listed.

Source: Spencer, R. (2002). Hydrangeaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.