What are the different varieties of poison ivy and how can one identify and differentiate between them?
There are three main varieties of poison ivy: Eastern poison ivy, Western poison ivy, and Pacific poison oak. They all have similar characteristics, such as three leaflets per leaf and a shiny appearance. To differentiate between them, Eastern poison ivy typically has smooth leaf edges, while Western poison ivy has toothed edges. Pacific poison oak has lobed leaves and can grow as a shrub or vine. It's important to avoid contact with all varieties to prevent a rash.