长苞毛白杨新变种图1,图6—1 Populus tomentosa Carr. var. longibracteata Z.Y.Yu et T.Z.Zhang, var.nov. A typo varietatis recedit bracteis longiellipticis, majoribus, circiter 8-9mm longis, incisuris non profundis. Shaanxi. Xian alt. 485m, 1eg.T.Z.Zhang 3599 (folium) Ⅶ. 21. 1985; id. 8799. (inflorescentia) Ⅲ. 3. 1987 (Typus! in Herb. N.-W. Inst. Bot. conservatus; growing specimen in Huxian Nursery).