Hydrangea paniculata (panicled hydrangea) is a species of flowering plant in the family Hydrangaceae native to southern and eastern China, Korea, Japan and Russia (Sakhalin). It was first formally described by Philipp Franz von Siebold in 1829. It is a deciduous shrub or small tree, 1–5 m (3.3–16.4 ft) tall by 2.5 m (8 ft) broad, growing in sparse forests or thickets in valleys or on mountain slopes.The leaves are broadly oval, toothed and 7–15 cm (3–6 in) long.