Poison-Ivy.org and About.com's landscaping site provide information and visual aids to help identify poison ivy. Poison ivy leaves come in bunches of three and do not have jagged or scalloped edges. Depending on the region and the season, the visual characteristics of the plant can vary widely.
Poison-Ivy.org provides detailed visual drawings as well as photographs of poison ivy to help identify it in nature. It offers photographs that include poison ivy plants next to similar plants that are often mistaken for poison ivy. The site also allows users to browse images of poison ivy during different seasons. The most common type of poison ivy is Eastern poison ivy, which can grow on the ground or grow upwards into a vine.
About.com provides a gallery of poison ivy images with helpful descriptions to help identify poison ivy plants. Poison ivy grows in a variety of places from roadsides to the tops of trees, making the chances of coming into contact with the plant very high.
Contact with poison ivy causes a rash that swells and may develop blisters. The plant often causes severe itching after exposure, according to the Mayo Clinic. Although uncomfortable, rashes generally resolve themselves after a few weeks.