Salix integra
Salix integra (Chinese: 杞柳 "qi liu"; Japanese: イヌコリヤナギ "inukoriyanagi "; syn. "S. multinervis" ) 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. The flowers are produced in small catkins 1-2.5 cm long  in early spring; they are brownish to reddish in colour. It is dioecious, with male and female catkins on separate plants. It is closely related to the European and western Asian "Salix purpurea", and has been treated as a variety of it by some authors, as "S. purpurea" var. "multinervis" (Franchet & Savatier) Matsumura, or as a subspecies "S. purpurea" subsp. "amplexicaulis" (Chaubard) C.K.Schneid. Cultivation and uses. The cultivar 'Hakuro Nishiki' (dappled willow) is widely grown as an ornamental plant for its variegated foliage, the leaves strongly mottled with patches and blotches of white and pale pink. As its growth is  fairly weak and shrubby, it is commonly sold grafted on the top of a straight stem of another willow. It has gained the Royal Horticultural Society’s Award of Garden Merit.