''Toxicodendron pubescens'' (syn. ''
Rhus pubescens
''Toxicodendron pubescens'' (syn. '' Rhus pubescens''), commonly known as Atlantic poison oak, is an upright shrub that can grow to 1 metre (3 feet) tall. Its leaves are 15 centimetres (6 inches) long, alternate, with three l ...
''), commonly known as Atlantic poison oak, is an upright
shrub
A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from tree ...
that can grow to 1 metre (3 feet) tall. Its
leaves
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, st ...
are 15 centimetres (6 inches) long, alternate, with three leaflets on each. The leaflets are usually hairy and are variable in size and shape, but most often resemble
white oak
The genus ''Quercus'' contains about 500 species, some of which are listed here. The genus, as is the case with many large genera, is divided into subgenera and sections. Traditionally, the genus ''Quercus'' was divided into the two subgenera ''C ...
leaves; they usually turn yellow or orange in autumn. The
fruit
In botany, a fruit is the seed-bearing structure in flowering plants that is formed from the ovary after flowering.
Fruits are the means by which flowering plants (also known as angiosperms) disseminate their seeds. Edible fruits in partic ...
is small, round, and yellowish or greenish. It is not closely related to
true oaks.
Distribution and habitat
This species is native to the
Southeastern United States
The Southeastern United States, also referred to as the American Southeast or simply the Southeast, is a geographical List of regions in the United States, region of the United States. It is located broadly on the eastern portion of the south ...
from
Virginia
Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth are ...
Digital Atlas of the Virginia Flora: ''Toxicodendron pubescens''.
westward to Texas
Texas (, ; Spanish: ''Texas'', ''Tejas'') is a state in the South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by ...
and Oklahoma
Oklahoma (; Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a state in the South Central region of the United States, bordered by Texas on the south and west, Kansas on the north, Missouri on the northeast, Arkansas on the east, New ...
.
Atlantic poison oak can be found growing in forests, thickets, and dry, sandy fields.
Toxicity
All parts of this plant contain urushiol
Urushiol is an oily mixture of organic compounds with allergenic properties found in plants of the family Anacardiaceae, especially '' Toxicodendron'' ''spp.'' (e.g., poison oak, Chinese lacquer tree, poison ivy, poison sumac), ''Comoclad ...
, which can cause severe dermatitis
Dermatitis is inflammation of the skin, typically characterized by itchiness, redness and a rash. In cases of short duration, there may be small blisters, while in long-term cases the skin may become thickened. The area of skin involved c ...
in sensitive individuals. The risk of exposure may be reduced by learning to recognize and avoid this species and wearing clothing that covers the legs and arms. Contaminated clothing should be laundered before subsequent handling or use.
Effects of poison oak are similar to those of poison ivy. It first causes severe itching, evolves into inflammation, non-colored bumps, and then blistering when scratched.
See also
* Poison sumac
''Toxicodendron vernix'', commonly known as poison sumac, or swamp-sumach, is a woody shrub or small tree growing to 9 metres (30 feet) tall. It was previously known as ''Rhus vernix''. This plant is also known as thunderwood, particul ...
* Western poison oak
''Toxicodendron diversilobum'' (syn. ''Rhus diversiloba''), commonly named Pacific poison oak or western poison oak, is a woody vine or shrub in the sumac family, Anacardiaceae. It is widely distributed in western North America, inhabiting coni ...
References
External links
* See Tecnu skin cleanser Wikipedia
All about Eastern Poison Oak
{{Diseases of the skin and subcutaneous tissue
pubescens
Flora of the Southeastern United States
Flora of the United States
Plants described in 1768
Taxa named by Philip Miller