A forest of quaking aspens.
quaking aspen definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a North American poplar (Populus tremuloides) with small, flat-stemmed leaves that tremble in the lightest breeze
quaking aspen definition by American Heritage Dictionary
A North American deciduous tree (Populus tremuloides) having broadly ovate, finely toothed leaves with a truncate base.