Plains Cottonwood - Populus deltoides ssp. monilifera
With scattered populations throughout the United States and Canada, this subspecies is most abundant in the Great Plains, although it grows west to the Columbia Plateau and integrades with the other subspecies to the west and east.The leaves have a long tip, curved, blunt teeth, and are borne on flattened stems that make them flutter in a breeze. Subspecies monilifera has leaves that are wider than long and less than 4 inches in length.Young twigs are yellow-brown in color and winter buds are resinous and fragrant. The trunk is straight and tall, and on old trees is buttressed.