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triangle burr ragweed

Scientific Name: Ambrosia deltoidea

Family: Asteraceae

Category: Dicot

Growth: Subshrub, Shrub

Duration: Perennial

Other Names:

       

Ambrosia deltoidea: Triangle Bur Ragweed

Ambrosia deltoidea, commonly known as Triangle Bur Ragweed, is a North American flowering plant belonging to the aster family (Asteraceae). Other common names include Triangle Bursage and Triangleleaf Bursage.

Considerations for Pets

  • The plant produces burr-like seeds.

Taxonomy and Nomenclature

  • Scientific Name: Ambrosia deltoidea (Torr.) Payne
  • Family: Asteraceae (Aster Family, also known as the Sunflower family)
  • Genus: Ambrosia L. (ragweed, bursage)
  • Synonym: Franseria deltoidea Torr.

Distribution and Habitat

  • Native to North America.
  • Commonly found in Arizona.
  • Specifically mentioned as being present in the Sonoran Desert.
  • Grows abundantly among saguaro cacti and palo verde trees.

Morphological Characteristics

  • It is a subshrub or shrub.
  • Perennial, meaning it lives for more than two years.
  • Has numerous ascending to erect stems, typically 30-80 cm tall, arising from a woody base.
  • The branches are dark brown, rounded or flat-topped.
  • The fruit is a bur.

Ecological Role

  • Ragweeds are anemophilous, meaning they are pollinated by wind. Their pollen is very small and light.

Quirky Facts

  • Though commonly called a ragweed, the fruit of Ambrosia deltoidea is a bur.

Further Information

  • USDA Symbol: AMDE4
  • Discover Life: Discover Life
  • Dave's Garden: Dave's Garden
  • University of Chicago Library.
  • BLM AZ930