甜杨 tian yang

Populus balsamifera Linnaeus var. suaveolens Loudon, Arb. Brit. 3: 1674. 1838.

Trees to 30 m tall; bark grayish green and smooth when young, dull gray and furrowed when old; crown oblong. Branchlets gray or grayish brown, terete, slightly pubescent. Buds brown, elongate, viscid. Petiole terete, 0.5-3(-4) cm, glabrous or pilose; leaf blade elliptic, ovate-orbicular, elliptic-oblong, or obovate-elliptic, 5-12 × 2-5.5 cm, usually broadest at middle, base rounded or subcordate, margin crenate-serrate, ciliate, apex abruptly acuminate or shortly acuminate, often twisted. Sprouts with leaf blade to 18 cm, abaxially grayish white, glabrous or pilose, adaxially dull green, base subcordate; lateral veins 3-5 on each side. Male catkin 4-5 cm. Female catkin 6-8 cm, ca. 10 cm in fruit. Female flower: ovary conical; style 3-parted; stigma broadly ovate or reniform, with sinuous margin. Capsule glabrous, often 3-valved, subsessile. Fl. May, fr. Jun. 2n = 38.

Riversides. E Nei Mongol (Da Hinggan Ling Diqu), Shaanxi [Mongolia, Russia (E Siberia)]

Used for timber, industrial wood, and wood pulp.