Toxicodendron diversilobum

Toxicodendron diversilobum, also known as Pacific poison oak, is a woody vine or shrub in the Anacardiaceae family. It is native to the western region of North America, where it is widespread and commonly found in a variety of habitats.

Description

Toxicodendron diversilobum is a deciduous plant that can grow as a dense shrub up to 3 meters tall, or as a vine that climbs on other vegetation or structures. The leaves are divided into three leaflets, each 3.5 to 10 cm long, with the central leaflet on a longer stalk. The leaflets are usually lobed, giving the species its name "diversilobum", meaning "diverse lobes". The leaves turn bright red in autumn before falling off.

Distribution and habitat

Toxicodendron diversilobum is native to the western regions of North America, from British Columbia to Baja California, and eastward to Nevada. It is found in a wide range of habitats, from sea level to mountainous regions, and from open fields to dense forests.

Toxicity

Like other members of the genus Toxicodendron, T. diversilobum contains urushiol, a clear liquid compound found within the sap of the plant that causes an allergic reaction in most people who touch it. This reaction can range from a mild rash to severe dermatitis. The plant is most toxic in spring and early summer when the sap is most abundant.

Ecology

Toxicodendron diversilobum plays a significant role in its ecosystem. It provides food and habitat for a variety of wildlife species, including several species of birds and mammals. Despite its toxicity to humans, some animals, such as deer and goats, are able to eat the leaves without apparent harm.

See also

• Toxicodendron radicans (Eastern poison ivy)
• Toxicodendron rydbergii (Western poison ivy)
• Toxicodendron vernix (Poison sumac)