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woollyleaf burr ragweed

Scientific Name: Ambrosia grayi

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Ambrosia grayi - Woollyleaf Burr Ragweed

This page provides information about Ambrosia grayi, commonly known as Woollyleaf Burr Ragweed. This plant is also referred to by other common names, including woollyleaf bursage, woolly-leaf bur-sage, lagoonweed, and simply, Bur Ragweed.

Considerations for Pets

  • The plant produces burs, which could potentially become entangled in a pet's fur.
  • The leaves and stems are covered in fine, woolly hairs, which might be an irritant to some animals.

Considerations for Children

  • The plant produces burs, which could potentially become entangled in clothing or hair.
  • The leaves and stems are covered in fine, woolly hairs, which might be an irritant to some children.

Taxonomy and Nomenclature

  • Scientific Name: Ambrosia grayi (A. Nelson) Shinners
  • Family: Asteraceae (Composite Family)
  • Synonyms:
    • Franseria tomentosa Gray (mentioned in connection to Woollyleaf bursage)
    • Ambrosia eriocentra (A.Gray) W.W.Payne (mentioned as eriocentra – woolly fruit bur ragweed)

Distribution and Habitat

  • Native to North America.
  • Found in periodically exposed, dry riverbeds.
  • Occurs in moist places in fields, rangeland, and roadsides.

Ecological Role

  • Classified as a noxious weed in Kansas.
  • Can form dense stands.

Morphological Characteristics

  • Medium-sized, upright composite shrub.
  • Reaches a height of 10-30 cm (approximately 4-12 inches). Some reports mention larger sizes from 75-200cm.
  • Leaves are lance-shaped and up to 9 centimeters long, not counting the winged petioles.
  • Leaves are triangular, deeply notched.
  • Leaves are grayish-green to white with irregularly lobed and toothed margins and short leaf stalks.
  • New leaves are coated thinly in woolly fibers.

Quirky Facts

  • The plant has several common names, reflecting its bur-like fruit and woolly texture. Some of these names include "Woollyleaf Povertyweed" and "Lagoonweed."

Interactions with Other Organisms

  • It can be controlled with herbicides that target broadleaf weeds, brush, and vine species.

Further Information

  • Dave's Garden: https://davesgarden.com/ (mentioned as a resource for garden tips and information)