serrate-leaved hydrangea

H. serratifolia is a slow-growing, evergreen climber eventually attaining heights of 12m or more. Its stout, leathery, elliptic leaves are up to 15cm long and 7cm wide, with distinct veins and small pits often occurring in the vein axils beneath. Small, creamy-white flowers are borne in late summer in crowded panicles up to 15cm long and 9cm wide