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Rio Grande ragweed

Scientific Name: Ambrosia cheiranthifolia

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names: TX (South Texas ambrosia)

       

Rio Grande Ragweed (Ambrosia cheiranthifolia)

Ambrosia cheiranthifolia, commonly known as Rio Grande ragweed or South Texas ambrosia, is a rare species of flowering plant.

Considerations for Pets

  • This plant is a ragweed, and there is some mention of "burr ragweed," so this species may produce burrs.

Considerations for Children

  • This plant is a ragweed, and there is some mention of "burr ragweed," so this species may produce burrs.

Nomenclature and Taxonomy

  • Scientific Name: Ambrosia cheiranthifolia A. Gray
  • Family: Asteraceae
  • Synonyms: South Texas Ragweed, South Texas Ambrosia

Common Names

  • Rio Grande ragweed
  • South Texas ambrosia

Distribution and Habitat

  • Native to South Texas, specifically the Rio Grande Plains and Coastal Prairies.

Morphological Characteristics and Growth Habits

  • Type: Forb/herb (a non-woody plant that is not a grass)
  • Duration: Perennial
  • Growth habit: Low-to-mid size growing

Ecological Role

  • Ragweed pollen is a known allergen.

Interactions with Other Organisms

  • It serves as a food plant for some caterpillars in the Lower Rio Grande Valley of Texas.
  • The Ragweed Leaf Beetle (Zygogramma suturalis) or a closely related species may interact with this plant.

Further Information

  • Taxonomic information is available from the British Database of World Flora and Fauna.
  • Dave's Garden is a resource for gardening tips and plant information.