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scouringrush horsetail

Scientific Name: Equisetum hyemale

Family: Equisetaceae

Category: Horsetail

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Equisetum hyemale (Rough Horsetail)

Equisetum hyemale, commonly known as rough horsetail, scing rush, scingrush horsetail, Dutch rush, and in South Africa as snake grass, is a perennial herb with a distinctive appearance.

Considerations for Pets

  • The plant has rough, ridged stems.
  • The plant is fast-growing and may spread in gardens.

Considerations for Children

  • The plant has rough, ridged stems.
  • The plant is fast-growing and may spread in gardens.
  • Historically, the stems have been used for scing utensils.

Taxonomy and Nomenclature

  • Scientific Name: Equisetum hyemale L.
  • Family: Equisetaceae
  • Synonyms: Equisetum affine, Equisetum hyemale ssp. affine, Equisetum hyemale var. californicum, Equisetum hyemale var. affine
  • Common Names: Rough Horsetail, Scing Rush, Scingrush Horsetail, Dutch Rush, Snake Grass, Horsetail, Scing Horsetail, Canuela, Shave-grass. Other common names include Common Scing Rush, Rough Scing Rush, Bottlebrush, Horsetail, Field Horsetail.

Distribution and Habitat

  • Native to Florida.
  • Occurs in woods, fields, meadows, swamps, and moist soils alongside streams and rivers.
  • Also found in regions including Albania, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland).

Ecological Role

  • Some horsetail species, including Equisetum hyemale, are considered weeds and can be invasive.
  • In high densities, it can reduce yields in agricultural settings.
  • Horsetail may play a role in regenerating soil health by depositing minerals onto the surface soil.

Morphological Characteristics and Growth Habits

  • Non-flowering, rush-like, rhizomatous, evergreen perennial.
  • Typically grows 3-5 feet tall, but can reach up to 3 ft (0.9 m) or even 1 m (3ft 3in).
  • Has unbranched stems with rough black ribs which slightly constrict the stem.
  • Produces both fertile and infertile shoots.
  • Each shoot has a single central stem that is jointed and more or less unbranched.
  • Spreading, reed-like growth habit.
  • Hardy to zone (UK) 5.

Quirky Facts

  • The name "scing rush" comes from its historical use as a scing utensil due to its high silica content.
  • Horsetails are considered a primitive group of plants known for their bizarre appearance and have existed for millions of years.
  • It belongs to the Equisetophyta, and is the only surviving genus of this group.

Interactions with Other Organisms

  • Can reduce yields if growing in high densities in fields.

Resources

  • Dave's Garden (davesgarden.com)
  • Weed Science (wsweedscience.org)
  • California Invasive Species Council (cal-ipc.org)