The document describes several species of trees and shrubs in the willow family including narrowleaf cottonwood, balsam poplar, eastern cottonwood, Fremont cottonwood, bigtooth aspen, quaking aspen, black cottonwood, Bebb's willow, black willow, and Scouler willow. For each species, brief details are provided about their leaves, flowers, fruits, twigs, bark, and typical form or growth habit.