Populus tremuloides, commonly known as Quaking Aspen (or Trembling Aspen, American Aspen, White Poplar, Mountain Aspen etc.), is a deciduous North American tree species endemic to cooler, often mountainous regions.
The thin, flat, flexible petioles on this species make the leaves particularly susceptible to being shaken by even the slightest breeze, hence it’s common name.
The tree can propagate by roots to form large groves. Quiet, breezy days in such groves can sound like a great rain stick sounding in all directions.