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Rio Grande Ragweed (Ambrosia cheiranthifolia)

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Home « Wisconsin « Lincoln « Ambrosia « Ambrosia cheiranthifolia
Family: ASTERACEAE
Genus: Ambrosia
Species: Rio Grande Ragweed (Ambrosia cheiranthifolia)

Rio Grande Ragweed Species Description

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This species is native to North America north of Mexico.

Allergenicity: Rio Grande Ragweed (Ambrosia cheiranthifolia) is a severe allergen.

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

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

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

Perennial: Living for many years.

Herbaceous Stem: Not woody, lacking lignified tissues.

Rio Grande Ragweed Species Usage

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Rio Grande Ragweed 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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