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dwarf horseweed

Scientific Name: Conyza ramosissima

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Annual

Other Names: OH (bushy horseweed)

       

Dwarf Horseweed (Conyza ramosissima)

Considerations for Pets

  • The text mentions that Dwarf Horseweed is commonly found in gardens, so pets that spend time outdoors might encounter it.

Considerations for Children

  • The text mentions that Dwarf Horseweed is commonly found in gardens, so children that spend time outdoors might encounter it.

Common Names

  • Dwarf Horseweed
  • Dwarf Conyza
  • Branching Conyza
  • Dwarf Fleabane
  • Bushy Horseweed

Scientific Name and Classification

  • Scientific Name: Conyza ramosissima Cronquist
  • Family: Asteraceae (Sunflower Family)
  • Genus: Conyza
  • Species: ramosissima

Synonyms

  • Erigeron divaricatus
  • Leptilon divaricatum

Morphology and Growth Habits

  • The height of Horseweed (including dwarf varieties) can vary significantly depending on soil quality, from a few centimeters on poor soil to as high as seven feet in rich soil.
  • Flowerheads of Conyza ramosissima resemble those of Conyza canadensis (Horseweed).

Interactions with Other Organisms

  • Glyphosate-resistant Horseweed can form hybrids with Dwarf Horseweed.

Related Species

  • Conyza canadensis (Horseweed, Canada Fleabane)
  • Conyza laevigata (Manzanilla Horseweed)
  • Conyza bonariensis (South American Horseweed, Asthma Weed)

Resources and Further Information

  • USDA-NRCS PLANTS Database
  • Dave's Garden
  • TERMIUM (Government of Canada's terminology and linguistic data bank)