Populus x canadensis Height: up to 30 m, fast-growing Trunk: grey bark Crown: forms widely spreading crowns Leaves: triangular to rhombic, 7-10 cm long, serrated margins, flattened, reddish petiole Flowers: long catkins in March/April before leaves emerge Other: hybrid of Populus nigra and Populus deltoides Photos: Janina Deutschmann (1,2,3)