Berlin Poplar - Populus nigra x P. laurifolia = P. x berolinensis
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Species Description
Stace 4:
P. x berolinensis (K. Koch) Dippel (P. nigra 'italica' x P. laurifolia) - Berlin Poplar.
Narrow, subfastigiate tree to 30m; leaves ovate-elliptic to -rhombic, rounded to cuneate at base, acuminate at apex; petioles sparsely hairy; male and female; (2n=38). Neophyte-survivor; formerly much planted for amenity and still found surviving, rarely suckering; England North to County Durham, Mid Ebudes; arose in Berlin in 1860s.
Key:
- Leaves serrate, the tip of each serration reaching nearer leaf apex than the base of the notch distal to it (Black-/Balsam-poplar hybrids)
- Leaves ovate-elliptic to -rhombic, rounded to cuneate at base