Toxicodendron diversilobum
SPECIMEN · FROM THE LIBRARY
Toxicodendron diversilobum

Toxicodendron Diversilobum

Photo · (c) Stacey Vielma, all rights reserved, uploaded by Stacey Vielma COURTESY INATURALIST
ON THIS PLANT

Toxicodendron diversilobum, commonly known as poison oak, is a woody vine or shrub native to western North America. Belonging to the Anacardiaceae family, it can grow up to 6 feet tall. The plant features distinctive leaves divided into three leaflets, which have a glossy appearance and turn red in the fall.

In the spring, poison oak produces small greenish-white flowers, followed by small white berries that ripen in late summer or early fall. The plant contains urushiol oil, which can cause an allergic reaction upon contact with the skin.

Poison oak thrives in various habitats, including forests, woodlands, grasslands, and chaparral areas. It serves as an important food source for wildlife, such as birds and deer.

To avoid contact with poison oak, it is essential to learn how to identify the plant and steer clear of areas where it grows. If you come into contact with poison oak oil on your skin or clothing, wash immediately with soap and water.

Overall, Toxicodendron diversilobum plays a significant ecological role but should be handled with caution due to its potential for causing allergic reactions in humans upon contact.

THE NAME

Pacific Poison Oak, also known as Western Poison Oak, is a plant that belongs to a genus notorious for causing severe skin reactions upon direct contact. The name "Toxicodendron" translates to "poison tree," while "diversilobum" means "different lobes," likely referring to the plant's irregularly lobed leaflets that resemble oak leaves. Because this plant is commonly found in the western regions of North America, it is referred to as Pacific Poison Oak or Western Poison Oak.

CHARACTERISTICS

Botanical profile.

Plant Type
Shrub, Vine
Life Cycle
Perennial
Genus
Toxicodendron
Family
Anacardiaceae
Hardiness Zone
5-9
Mature Height
0.49 m to 3.96 m
Mature Spread
0.61 m to 2.13 m
Leaf Color
Green, Yellow, Red
Leaf Type
Deciduous
Flower Color
White, Yellow, Green
Flower Size
0.51 cm to 0.76 cm
Bloom Time
Late spring, Early summer
Planting Time
Winter
Harvest Time
Mid summer
Native Area
Mexico
ALSO KNOWN AS

Other names.

en Pacific poison oak en Western poison-oak en Poison oak
ALSO IN THE LIBRARY

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