There are a number of plants to avoid in Delaware. Here's how to identify the big three – poison ivy, oak and sumac.

The plant may have yellow or green flowers or yellow-green berries, depending on the time of year. Like poison ivy and poison sumac, poison oak releases an oil called urushiol when it sustains damage.

Poison ivy grows throughout North America, especially in wooded areas, and touching it can give most people an itchy rash. Therefore, identifying and avoiding the plant is crucial if you don't ...