There are multiple subspecies of poison ivy in North America, but all have leaf groups of three and can be green or have a ...

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 ...

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.

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 ...

Got a problem with invasive ground cover weeds in your yard? Learn which plants are a problem and how to stop them in their ...

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 ...

Skin irritation, redness, itching—you know the signs. If you’ve been out in the garden recently and have come away with a nasty rash, you may have gotten yourself into a patch of poison ivy. Poison ...

Learn how to identify poison ivy, oak, and sumac plants and the rashes they cause. Although poison ivy isn't the only plant with leaves that grow in clusters of three, the adage "leaves of three, ...

Poison ivy usually grows as a vine, but can also take on a bushy form. It can grow anywhere and its appearance changes throughout the year, and it looks like dozens of innocent plants, such as ...

Can you give me some advice on poison ivy control — I’m very allergic. I know what it looks like. I need to get some information on how to get rid of it. — Jack Anyone cleaning out overgrown areas or ...

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 ...