What is Quaking aspen?
[[File:2013-10-06 15 04 21 Aspens during autumn along the Changing Canyon Nature Trail in Lamoille Canyon, Nevada.jpg|thumb|250px|''P. tremuloides'']] 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 [[sucker (botany)|suckers]] (root sprouts). They may come to air up to 40 m from the parent tree, and form extensive [[clone|clonal colonies]].<ref>Rushforth K. 1999. ''Trees of Britain and Europe''. Collins ISBN 0-00-220013-9</ref> == References == {{reflist}} [[Category:Trees]] [[Category:Malpighiales]]