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fireweed

Scientific Name: Chamerion angustifolium

Family: Onagraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Chamerion angustifolium - Fireweed

Chamerion angustifolium, commonly known as fireweed (mainly in North America), great willow-herb (some parts of Canada), and rosebay willow-herb or rosebay willowherb (mainly in Britain), is a perennial herbaceous plant belonging to the willowherb family, Onagraceae.

Considerations for Pets

  • Fireweed is mentioned as being potentially toxic to livestock.

Considerations for Children

  • The plant is gathered for herbal uses, suggesting it may have properties of interest.

Taxonomy and Nomenclature

  • Scientific Name: Chamerion angustifolium
  • Family: Onagraceae (Willowherb or Evening Primrose Family)
  • Synonyms/Alternative Names: great willow-herb, rosebay willow-herb, rosebay willowherb, giant showy willow herb.
  • Symbol: CHAN9
  • Group: Dicot
  • Growth Habit: Forb/herb

Distribution and Habitat

  • Native to North America, from sub-Arctic regions down the Rocky Mountains, across the upper Midwest, and down the Appalachians to Georgia.
  • Found throughout the US, except in the southeastern states and Texas.
  • Occurs in all Canadian provinces.
  • Also reported in coastal New South Wales (NSW), Australia, where it is considered a pasture weed.
  • Often found in recently burned clearings, clear-cuts, and roadsides.

Ecological Role

  • Fireweed is a pioneer species, one of the first plants to appear after a forest or brush fire.
  • It rapidly covers scrub or woodland areas that have been cleared.
  • In some regions, such as Queensland, Australia, *Senecio madagascariensis* (also called Fireweed), is considered a declared pest.

Morphological Characteristics

  • Perennial plant with widespread rhizome-like roots that form new shoots freely.
  • Has willow-like leaves and red stems.
  • Features striking magenta blossoms.
  • Tall perennial.
  • Displays spike-like clusters of pink to purplish flowers with 4 paddle-shaped petals and a long white style.

Interactions with Other Organisms

  • Its tiny seeds ride the wind.
  • Beekeepers sometimes move hives to areas rich in fireweed for honey production.
  • Competes strongly with pasture species in some regions.
  • Can be toxic to livestock.

Quirky Facts

  • Fireweed is so named because it is often the first plant to colonize areas after a fire.
  • Fireweed honey is highly prized, leading beekeepers to transport their hives to areas where it grows.

Further Information

  • Extension Faculty Health, Home and Family Development publication FNH-00106 by Roxie Rodgers Dinstel and Leslie Shallcross.
  • Information available on the wildflowers of British Columbia, Canada.