A vigorous, perennial climbing plant, profusely blooming with white, trumpet-shaped flowers. Plants may grow to about 20 metres in height and have a long root system with a deep tap root. The stalked, opposite leaves, which have a rough surface, are quite variable in shape. They may be triangular or ovate and the margins may be toothed, lobed or entire. Length is up to 200 mm and width is up to 60 mm