Trees or creeping, cushioned, erect shrubs. The branches are cylindrical and the pith is nearly round. There is no terminal bud, the lateral buds are usually close to the branches, and the bud scales are single. Leaves alternate, sparsely opposite, usually narrow and long, mostly lanceolate, pinnately veined, serrated or entire; Petiole short; Stipules, serrated, usually early, sparsely persistent.
Inflorescence erect or obliquely spreading, leaves open first, or open at the same time with leaves, leaves open after sparse; Bracts entire, hairy or glabrous, persistent, sparsely caducous; Stamens 2- numerous, filaments free or partially or completely connate; Gland 1-2 (located between inflorescence axis and filament, abdominal gland, near bract, dorsal gland); The pistil consists of 2 carpels, the ovary is sessile or stipitate, the styles are different in length, or missing, single 1 or dehiscent, the stigma 1-2, dehiscent or indehiscent. Capsule 2-valved; The seeds are very small. How dark brown.
Extended data:
Willow, deciduous tree, height10 ~12m.
There are long drooping branches, and the branchlets are brown and hairless, and they are slightly hairy when they are young.
The leaves are lanceolate to linear lanceolate, 9 ~ 16 cm long and 5 ~ 15 mm wide, the top is tapered, the base is wedge-shaped, the edge is serrated, the top is green, the bottom is white, and the lateral veins 15 ~ 30 pairs; The petiole is 6 ~ 12 mm long.
Flowers are unisexual and dioecious; The first leaf of inflorescence opens or opens at the same time as the leaves; Racemes pubescent; Male inflorescence is 1.5 ~ 2 cm long, and female inflorescence is 5 cm long. Bracts rounded to linear-lanceolate, caducous; The male flower has 2 glands, 2 stamens, separated and villous at the base; The female flower has glands, the ovary is hairless, sessile, the style is extremely short, and the stigma is 2-lobed.
Baidu encyclopedia-willow
Baidu encyclopedia-willow branch