Occasionally these invaders are welcome guests. But this reaction is specifically an allergic reaction, which is why some people are more likely to come down with poison ivy than others: If you're not allergic to urushiol, then you're not going to get poison ivy. Typically, poison ivy plants are characterized by various stems that each contain three leaves. If you’re a tenderfoot, you may not know what these three plants […] Domestic Weed Killer. Types of Poison Ivy and How to Identify Them. And many places have none of these nasty plants. However, there are several subspecies or varieties of poison ivy that make identification a bit tricky. In different states, there are different types of poison ivy and oak. Glyphosate, the active ingredient in Asteroid Biocare can be used and the following notes will aid its efficacy. The substance (uroshiol) that causes […] Poison ivy is a common plant on the North American continent, noted for its ability to create an itchy rash on contact with skin. Many types of ivy take their name from their native country. However, there are several subspecies or varieties of poison ivy that make identification a bit tricky. How to Identify Poison Ivy. To avoid the unpleasant experience of dealing with the rash associated with contact with this plant, you’ll want to know how to identify poison ivy, including learning about the different types of poison ivy. How to Identify Poison Oak, Poison Ivy, and Poison Sumac Plants. Poison ivy may grow as a single plant, a bush or a vine. Gardenerdy gives you some stellar identification tips to help you avoid an encounter with these poisonous plants. Poison ivy is number one on our list of plants to avoid, because it contains a resin that can induce a very unpleasant skin rash if you touch it. English ivy (Hedera helix) has classically shaped three to five-lobed leaves in a glossy dark evergreen hue. There’s nothing like a long nature hike to relieve stress and invigorate your soul. Plant Identification. However, if they require removal, positively identify them first. So we created some maps to help you figure out which plants to look for. Every gardener will encounter poison ivy at some point. Although most ivies have dark-green leaves, some have slightly different colors. The allergenic triumvirate of poison oak, poison ivy, and poison sumac can really act as dampeners on your outdoor activities.