Poison Ivy in Summer photo by Lisa Bird

Poison Ivy

Toxicodendron rydbergii

Appearance: Poison Ivy is a member of the Sumac family and recognizable by its three shiny leaflets, white flowers in March to June, and smooth white berries later in the summer.  It grows to a mature height of 2 feet.

Habitat: Found in the plains and foothills, it grows on rocky slopes and at cliff bases in full sun to partial shade. (more…)