Populus tremula is a species of poplar native to cool temperate regions of the Old World.
Populus tremula
Adult leaves (left); juvenile and sucker leaves (right)
Populus tremula growing well north of the Arctic Circle in Norway; April 2008.
Populus is a genus of 25–30 species of deciduous flowering plants in the family Salicaceae, native to most of the Northern Hemisphere. English names variously applied to different species include poplar, aspen, and cottonwood.
Populus
Mature trembling aspen trees (Populus tremuloides) with young regeneration in foreground, in Fairbanks, Alaska
Male catkins of Populus × canadensis
The seeds of the poplar tree are easily dispersed by the wind, due to the fine hairs surrounding them.