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Weak-Leaf Burr-Ragweed (Ambrosia confertiflora)

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Family: ASTERACEAE
Genus: Ambrosia
Species: Weak-Leaf Burr-Ragweed (Ambrosia confertiflora)

Weak-Leaf Burr-Ragweed Species Description

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This species is native to North America north of Mexico.

Allergenicity: Weak-Leaf Burr-Ragweed (Ambrosia confertiflora) is a severe allergen.

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

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.

Herbaceous Stem: Not woody, lacking lignified tissues.

Weak-Leaf Burr-Ragweed Species Usage

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Weak-Leaf Burr-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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