Catalan
trèmol 
Old World aspen with a broad much-branched crown; northwestern Europe and Siberia to North Africa.
1
We conducted an experiment using ten Populus tremula genotypes from the Swedish Aspen Collection that express extreme levels of baseline investment into foliar condensed tannins.
2
Herbivores that feed on European aspen ( Populus tremula) change across regional scales and selection on host defence genes may thus change at comparable scales.
1
The quaking aspen is the only deciduous tree that is abundant.
2
Connell was quick to say, "No," even though Ab was shivering like a quaking aspen in a gale.
3
Because some quaking aspen trees can reproduce by copying themselves, some people have wondered whether they might live forever, at least theoretically.
4
Behind me, far below, the stream wound like a silver ribbon, fringed with dark conifers and the changing, dying foliage of poplar and quaking aspen.