found: Work cat.: 96-161215: Simard, S. Ecology and management of paper birch and black cottonwood in southern British Columbia, c1992:p. 1 (black cottonwood (Populus balsamifera ssp. trichocarpa))
found: Web. 3(black cottonwood 1. Populus trichocarpa)
found: SPN(Populus trichocarpa California poplar (Black cottonwood))
found: Hortus 3(P. trichocarpa Torr. & A. Gray Western balsam poplar, Black cottonwood)
found: Cklist. vasc. flora:v. 2 (Populus trichocarpa Torr. & Gray ex Hook = Populus balsamifera ssp. trichocarpa (Torr. & Gray ex Hook.) Brayshaw)
found: The plants database, via WWW, Apr. 11, 2006(Populus balsamifera L. ssp. trichocarpa (Torr. & Gray ex Hook.) Brayshaw -- black cottonwood)
found: ITIS, Apr. 11, 2006(Populus balsamifera ssp. trichocarpa (Torr. & Gray ex. Hook.) Brayshaw -- balsam poplar, black cottonwood)
