<Li> Populus adenopoda--Chinese aspen (China, south of P. tremula) </Li> <Li> Populus davidiana--Korean aspen (Eastern Asia) </Li> <Li> Populus grandidentata--Bigtooth aspen (eastern North America, south of P. tremuloides) </Li> <Li> Populus sieboldii--Japanese aspen (Japan) </Li>

Where do aspen trees grow in north america