Salix rockii Goerz ex Rehder & Kobuski

Shrubs to 3 m tall. One-year-old branchlets russet, shiny or slightly downy. Buds purplish red, long ovoid, downy. Petiole 2-4 mm; leaf blade elliptic or obovate, 1.5-3 × 0.8-1.2 cm, abaxially sparsely grayish white villous, becoming glabrous or only slightly pilose along midvein, pale, adaxially dull green, glabrous, base rounded-cuneate, margin serrulate, rarely entire, apex acute; lateral veins (8-)10-12 on each side of midvein. Flowering coetaneous. Male catkin grayish white, oblong to shortly cylindric, 1-1.5 (-2) cm × ca. 8 mm; peduncle very short, without leaflets or only with 1 scalelike leaflet; bracts obovate-oblong, ca. 1/2 as long as filaments, abaxially villous, adaxially pubescent, yellowish green or reddish at apex. Male flower: glands 2; stamens 2; filaments free, basally downy; anthers yellow, ovoid. Female catkin cylindric, 1.5-2.5 × 0.8-1 cm, ca. 3.5 cm in fruit; peduncle short, with 2 or 3 often caducous leaflets, bracts elliptic, ca. as long as ovary, abaxially villous (usually glabrescent in fruit), adaxially subglabrous. Female flower: adaxial gland long ovate, abaxial gland sometimes present; ovary conical-ovoid, ca. 2 mm, downy, sessile or subsessile; style conspicuous, 2-lobed; stigma 2-cleft. Capsule ovoid, ca. 5 mm. Fl. May, fr. Jul.

Gansu, E Qinghai (Tongde Xian)

* Mountain slopes, Picea forests; circa 3700 m.

Salix rockii là một loài thực vật có hoa trong họ Liễu. Loài này được Goerz ex Rehder & Kobuski miêu tả khoa học đầu tiên năm 1932.

拉加柳（学名：Salix rockii）为杨柳科柳属的植物，是中国的特有植物。分布在中国大陆的甘肃、青海等地，生长于海拔2,820米至4,400米的地区，多生长在沟边、山坡或云杉林中，目前尚未由人工引种栽培。