清溪杨 qing xi yang

Populus duclouxiana Dode, Bull. Soc. Nat. Hist. Autun. 18: 190. 1905.

Female flower: style short or subsessile; stigma 2-parted, each part diverging.

* Mountain slopes; circa 2800 m. Gansu, Guizhou, Shaanxi, Sichuan, Xizang, Yunnan

This variety differs from var. rotundifolia (which occurs in Bhutan) as follows: leaves deltoid-orbicular, larger, apex shortly acuminate or obtuse; female catkin usually more than 10 cm.