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Eastern Poison-Ivy (Toxicodendron radicans)

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Family: ANACARDIACEAE
Genus: Toxicodendron
Species: Eastern Poison-Ivy (Toxicodendron radicans)

Eastern Poison-Ivy Species Description

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This species is native to North America north of Mexico.

Allergenicity: Eastern Poison-Ivy (Toxicodendron radicans) is a severe allergen.

Pollination: Occurs in following seasons depending on latitude and elevation: Spring to Summer.

Angiosperm - Flowering Dicot: Plants in this group have two embryonic leaves (dicotyledons). Examples of dicotyledons are beans, buttercups, oaks, sunflowers, etc.

Tree: A large plant, not exactly defined, but typically over four meters in height, a single trunk which grows in girth with age and branches (which also grow in circumference with age).

Shrub: A woody plant smaller than a tree, and usually with several stems from the same root.

Forb: A broad-leaved herb other than a grass, especially one growing in a field, prairie, or meadow.

Weed: Any plant growing in cultivated ground to the injury of the crop or desired vegetation, or to the disfigurement of the place; an unsightly, useless, or injurious plant.

Perennial: Living for many years.

State Noxious Weed: unpleasant and possibly also harmful.

Wetland Plant: Plants growing in aquatic or wetland habitats. These include all known floating, submerged, and emergent taxa, plus those that are found in permanently or seasonally wet habitats.

Woody Stem: Non-herbaceous. Lignified.

Herbaceous Stem: Not woody, lacking lignified tissues.

Eastern Poison-Ivy Species Usage

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Pharmacological: Used in medicine or pharmacological research.

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Eastern Poison-Ivy Species Location

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The shaded areas on the map indicates where the species has been observed in the United States. Click the map to see a full scale version of these allergy areas.
  - Native, observed in a county
  - Introduced, observed in a county
  - Rarely observed
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