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hairy ragweed

Scientific Name: Ambrosia canescens

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Hairy Ragweed (Ambrosia canescens)

Ambrosia canescens, commonly known as hairy ragweed, is a plant species within the Ambrosia genus. This plant is known for its allergenic pollen and its presence in various environments.

Considerations for Pets

  • The text mentions that ragweed stems are often hairy, which could be a minor irritant if pets brush against them.

Considerations for Children

  • The text mentions that ragweed stems are often hairy, which could be a minor irritant if children brush against them.

Taxonomy and Nomenclature

  • Scientific Name: Ambrosia canescens A. Gray
  • Common Name: Hairy Ragweed
  • Kingdom: Mentioned as part of the "Classification" but not explicitly named.
  • Rank: Species

Morphology and Growth Habits

  • Hairy ragweed can grow to a height of 1 to 7 feet (0.3 to 2.5 meters).
  • It exhibits a bushy, dense growth habit.
  • Stems are hairy.
  • Leaves can be deeply lobed, almost fern-like.
  • Flowers are greenish-yellow and appear in small heads.
  • Perennial herb, often with annual tops.
  • Stems are erect, stout, branching, and rhizomatous.

Distribution and Habitat

  • Ragweed is commonly found in fields, gardens, and roadsides.
  • It also grows near rivers, meadows, and pastures.
  • Prefers waste places and margins of fields.

Ecological Role

  • Ragweed pollen is a known allergen, impacting human health.
  • The plant is wind-pollinated.
  • Ragweed can be a competitive weed, especially in agricultural settings.

Interactions with Other Organisms

  • The text mentions sparrows found in a field of ragweed and hairy indigo.
  • Some ragweed species show glyphosate resistance.

Further Information

  • Dave's Garden community shares tips and ideas for gardens, along with seeds and plants.
  • National Invasive Species Information Center (NIISS) offers species profiles, habitat information, control methods, invasion details, and life cycle information.