 & Savatier) is a species of willow native to northeastern China, Japan, Korea and Primorsky Krai in the far southeast of Russia.It is a deciduous shrub growing to 2–6 m tall with greyish-green bark and reddish to yellowish shoots.The leaves are 2–10 cm long and 1–2 cm wide; they are pale green both above and below, and unusually for a willow, are often arranged in opposite pairs or whorls of three, rather than alternate.