It’s not just poison ivy leaves that harbor urushiol. Stems, roots, and even smoke from burning poison ivy can cause a reaction, at any time of year, Keegan said.

Each leaf has 3 leaflets, hence the adage, “Leaves of three, let it be.” Another key identifying characteristic of poison ivy is that one side of a leaflet may have an irregularly toothed margin, ...

Poison ivy vines are often found growing up tree trunks, on sides of buildings or growing on or near the ground. In the fall, poison ivy produces one of our most brilliantly colored leaves.

RELATED: This Ivy League wages hand-to-leaf combat against an English strangler Agriculture officials are proposing to add 19 species to the state’s quarantine list of prohibited plants. Plants ...

Poison ivy is perhaps the most common and best-known plant to avoid, resulting in blotching of the skin, burning water blisters, pain, and an intense itching sensation. Symptoms may be evident quickly ...

Poison ivy has a characteristic compound leaf consisting of three leaflets (so the saying, "Leaves of three, let it be"). The leaflets are 2 to 4 inches long and dull or glossy green with pointed ...

In areas where desirable plants also reside, hand pulling the poison ivy may be the best control Leaves of three? Here’s how to deal with poison ivy, an easy-to-overlook garden guest ...

The ilex or holly, and the ivy, both evergreen plants are traditional Christmas symbols: the holly for part of the same reason as the Glastonbury Rose is, because it represents the Crown of Thorns ...

A new study uses Carnegie Museum of Natural History specimens to find out how the leaves of poison ivy in Pennsylvania have changed with increased atmospheric carbon dioxide.