Toxicodendron vernix

Toxicodendron vernix, commonly known as Poison Sumac, is a woody shrub or small tree that belongs to the Anacardiaceae family. It is native to North America and is known for its ability to cause allergic reactions in humans.

Description

Toxicodendron vernix grows as a shrub or small tree, reaching heights of up to 20 feet. It has compound leaves with 7 to 13 leaflets. The leaflets are usually 2 to 4 inches long, with smooth edges and pointed tips. The plant produces small greenish flowers in the spring, which develop into white or grayish berries in the fall.

Distribution and Habitat

Toxicodendron vernix is found in the eastern and southern parts of the United States, as well as in parts of Canada. It typically grows in wet, swampy areas, such as marshes and peat bogs. It can also be found in hardwood forests, along the edges of ponds and lakes, and in other wetland habitats.

Toxicity

The plant contains urushiol, a clear liquid compound found within the sap, which causes an allergic reaction in most people who come into contact with it. This reaction, known as urushiol-induced contact dermatitis, can result in a rash, itching, and blistering. The severity of the reaction can vary depending on the individual's sensitivity and the amount of exposure.

Treatment and Prevention

Avoidance is the best way to prevent an allergic reaction to Toxicodendron vernix. If contact does occur, washing the affected area with soap and water as soon as possible can help to remove the urushiol and reduce the severity of the reaction. Over-the-counter creams and ointments can help to relieve the symptoms. In severe cases, a doctor may prescribe a course of corticosteroids.

See Also

• Toxicodendron radicans (Poison Ivy)
• Toxicodendron diversilobum (Poison Oak)
• Urushiol-induced contact dermatitis