poison sumac rash



poison sumac

?Poison Sumac

Poison Sumac leaves
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Sapindales
Family: Anacardiaceae
Genus: Toxicodendron
Species: T. vernix
Binomial name
Toxicodendron vernix
Kuntze

Poison Sumac (Toxicodendron vernix or Rhus vernix) is a woody shrub growing to 3 m tall. All parts of the plant contain a toxic resin called urushiol that causes skin and mucous membrane irritation to humans. When burned, inhalation of the smoke causes diarrhea and other internal irritations. The leaves are pinnate, 25-50 cm long, with 7 - 13 leaflets; the leaflets are 4-10 cm long and sometimes mistaken for individual leaves. The veins from which the leaflets grow are always red. The fruit is a small white or grey berry, produced in panicles 10-20 cm long; this distinguishes it from other sumacs which have red berries.

Poison Sumac

Poison sumac grows exclusively in very wet or flooded soils, usually in swamps and peat bogs, in the eastern United States and Canada.

In the U.S., it can grow as far west as Wisconsin, where it is found only in the southern part of the state. In the U.S., it is listed under the Federal Noxious Weed Act of 1974, as amended (7 U.S.C. 2801 et seq.), as a "noxious weed". Most U.S. states list this plant in similar categories. It is considered one of the "U.S. Invasive Weeds" [1].

Avoidance, treatment, and safety

For specific information on prevention and treatment of Toxicodendron rashes, see Urushiol-induced contact dermatitis.

References and external links

  • Entry for "TOVE" on PLANTS Database, USDA.
  • Wisconsin page for poison sumac.
  • Poison ivy / oak / sumac in "The Medicinal Herb FAQ".
  • The Poison Sumac Page Photos and facts about poison sumac.
  • Poison Oak at Wayne's Word
Search Term: "Poison_Sumac"
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Old Leaves Need To Die In Time Or They Will Bring A Plant Down 

Science Daily - Nov 02 3:07 AM
In a study from the November issue of the American Naturalist, researchers Alex Boonman and co-workers from the Netherlands show that it is beneficial for plants growing in a dense stand to shed their oldest, lower leaves once these become shaded. By using transgenic tobacco plants that do not shed their lower leaves, they were able to show that shaded old leaves become a burden to a plant

An itch we don't need 
Star Beacon - Oct 30 9:33 AM
Outdoors Insider, with Dale Sunderlin... With the deer archery season in full swing, all of us tried and true bow hunters are readying for the hottest time of the season, The Rut.

Growing up in the scary '50s in Iowa 
Seattle Times - Oct 20 12:11 AM
"I grew up in possibly the scariest period in American history," writes Bill Bryson in this winning Atomic Age memoir. And he's not...

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