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.