Quaking aspen

The quaking aspen is a term for two different aspen species.

Populus tremuloides, a native tree in North America. 
Popullus tremula, the European trembling aspen.

All aspens spread by suckers (root sprouts). They may come to air up to 40 m from the parent tree, and form extensive clonal colonies.Rushforth K. 1999. Trees of Britain and Europe. Collins ISBN 0-00-220013-9 

 References 

Category:Trees
Category:Malpighiales