The leaves of the aspen have the characteristic of twirling in the slightest breeze. It is this feature that earned it its name. It loves the light and colonizes clearings, cuttings and forest edges. The abandonment of agriculture in Pré-Michel was a blessing for this tree, which is gradually spreading. For the species already present, its arrival is a calamity. Indeed, the shade it brings causes the disappearance of many meadow flowers.