Poison ivy, poison oak and poison sumac can make for an uncomfortable summer or fall. If you have ever experienced the blisters, swelling and intense itching of even the briefest of encounters, then ...

Just the mention of the words “poison ivy” may have some of you itching already. The Johnson County Extension gardening hotline receives numerous requests for identification and control each summer.

Mason Heberling, associate curator of botany at the Carnegie Museum of Natural History, holds a poison ivy specimen collected in Lehigh County, Pa. in 1840, the oldest used in the study. A new study ...

A few years ago I was leading a group of Merrimack College ecology students on a nature walk, when one of them pointed to a vine with five leaflets per leaf, and asked if it was poison ivy. “No,” I ...

Michigan's summer climate provides ideal growing conditions for many flowers and other plants we enjoy — and for a few poisonous, three-leafed plants we all could do without. Though the common phrase: ...

If you're allergic to Toxicodendron radicans, more commonly known as poison ivy, you might view wintertime as a welcome reprieve from this plant's itchy rash. Unfortunately, that's not quite the case.

QUESTION: What's the best way to get rid of poison ivy? I have it in two locations. The first is in low-growing ligustrums that border my yard, and the second is along my backyard fence. -- Dave Plank ...

As East Texans take to decluttering their yard from fallen leaves, poison ivy, even brown and dormant, poses a risk of ...

I have to admit I have been remiss with respect to some topics. In most cases it was because I wrongly assumed some things were so widespread and common that any column of that type would simply be ...

Over a decade ago, when Peter Barron started removing poison ivy for a living, he decided to document his work. "Every year I always take pictures of the poison ivy as it's blooming," said Barron, who ...