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flatspine burr ragweed

Scientific Name: Ambrosia acanthicarpa

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Annual

Other Names:

       

Ambrosia acanthicarpa: Flat-Spine Burr-Ragweed

Ambrosia acanthicarpa, commonly known as flat-spine bur-ragweed, is an annual plant belonging to the Asteraceae family. It is also known by various other common names.

Considerations for Pets

  • The plant has burs with flattened, divergent spines.

Considerations for Children

  • The plant has burs with flattened, divergent spines.

Common Names

  • Flat-spine bur-ragweed
  • Annual burrweed
  • Annual bur-sage
  • Bur ragweed
  • Flat spine bursage
  • Annual bursage
  • Sand bur
  • Hooker's bur-ragweed
  • Western sand-bur

Taxonomy and Nomenclature

  • Scientific Name: Ambrosia acanthicarpa Hook.
  • Family: Asteraceae (Aster Family)
  • Genus: Ambrosia
  • Species: acanthicarpa
  • Synonyms:
    • Franseria acanthicarpa (Hook.) Coville

Morphological Characteristics

  • The plant is characterized by burs that are 5-10 mm long with several series of flattened, divergent spines.
  • Leaves are broadleaf.
  • Flowers are green.

Synonyms and Other Names

Other common names include flatspine burr ragweed, annual bursage, bursage, bursage ragweed, flat-spine burr-ragweed, sand bursage, and more.

Further Information

  • USDA-NRCS PLANTS Database
  • Oregon Flora Project