Poison ivy contains an oil called urushiol, which causes a red, itchy rash when it transfers to the skin. Every part of the plant contains this oil, from the roots to the stem to the leaves ...

While not truly poisonous, they all cause a painfully itchy rash upon contact due to an oil called urushiol on their leaves, ...

More than likely, we’ve all had a scare once or twice involving poison ivy. If you are an outdoor enthusiast, being educated ...

drawing of poison ivy stock illustrations Magnoliids, Asterids, chromolithograph, published in 1895 Magnoliids, Asterids: 1) Cornelian cherry (Cornus mas), 2) European ivy (Hedera helix); 3) Wild ...

If you develop black spots or streaks, there tends to be little or no redness and swelling. The medical term for this condition is black-spot poison-ivy dermatitis. It takes time for the rash to ...

A rash from poison ivy, poison oak or poison sumac is caused by an oil found in these plants called urushiol. When this oil touches your skin, it often causes an itchy, blistering rash. Most people ...

Numerous people tend to develop an itchy rash after coming into contact with poison ivy, which is a plant that contains an oil called urushiol. This oil resides in the leaves, stems, and roots of ...

Basal leaves tend to be larger and have longer petioles than upper stem leaves. Petiole to stem attachments are covered by a sheath. All parts of poison hemlock (roots, stems, leaves and seeds) are ...

Leaves of three, let them be! You've probably heard that little rhyme about poison ivy. But did you know that the plants poison ivy, poison oak, and poison sumac all contain the same rash-causing ...

First-year plants of poison hemlock are large rosettes ... The leaves at the base are typically larger than the leaves arising from the flowering stem. The flowering stem is smooth with no hairs or ...

Leaves of three — let them be! You've probably heard that little rhyme about poison ivy, the plant that can cause an itchy rash. But do you know why? It's because of urushiol (say: yoo-ROO-shee-ol), a ...