quaking aspen Salicaceae Populus tremuloides Michx.   symbol: POTR5
	Leaf: Alternate, simple, 1 to 3 inches long, green above and paler below, heart-shaped to nearly round with a fine toothed margin, petiole is flattened. Flower: Dioecious; male and female hanging catkins 1 to 3 inches long. Fruit: Catkin (2 to 4 inches long), with attached light green capsules which contain many small hairy seeds. Twig: Slender, glabrous, reddish brown often with a gray, waxy film; buds conical, reddish brown, terminal bud 1/4 inch long, may be slightly resinous. Bark: At first smooth, creamy yellowish-white to very light green; later developing thick furrows and becoming dark, especially near the base. Form: Small (30 to 40 feet tall) upright tree, which often occurs in thickets.
	USDAFS Silvics of North America - USDAFS Additional Silvics - Landowner Factsheet - USDA Plants Database Populus tremuloides is native to North America. Range may be expanded by planting. See states reporting quaking aspen (opens a new window).