(Alt: Rhus radicans, Toxicodendron radicans var. rydbergii )
Our local version of western poison-ivy (Toxicodendron rydbergii) occurs as an open colony of low-growing erect stems, primarily close to water sources below 4000 ft elevation.
Even in winter, western poison-ivy can be readily recognized by its dull grayish stems bearing whitish berries. Broken winter stems should be avoided, and emerging young leaves in spring are particularly rich in dermatitis-causing urushiol. Many birds, however, relish the berries as an important winter food source.