Learn More Details About This Plant

Plant Data

Names and Taxonomy

  • Common Names: “Smooth Horsetail, Smooth Scouring Rush, Kansan Horsetail”
  • Synonyms: “Equisetum funstonii, Equisetum kansanum, Hippochaete laevigata”
  • Family: Equisetaceae
  • Genus Information: AZ: 4, CA: 6, NV: 4, UT: 4, NM: 5, CO: 5, TX: 3

Habit and Size

  • Duration: Perennial
  • Type: Herb
  • Habit: Erect
  • Shape: Irregular
  • Size: 2' - 5' x 1' - 3'
  • Stem: Bright green, smooth, usually unbranched, hollow, distinctively ribbed with flattened ridges

Leaves

  • Color: bright green, turning brown to black at the sheath margins
  • Shape: Scale-like sheaths
  • Edge: Entire
  • Ligule-Petiole:
  • Arrangement: Whorled (fused into sheaths at nodes)
  • Leaf Retention: Deciduous to partly evergreen

Flowers and Fruit

  • Sex: Hermaphroditic (spore-bearing via cones)
  • Flower Color: Not Applicable (Non-flowering)
  • Flower Size: Not Applicable
  • Number of Petals: Not Applicable
  • Bloom: April–July (Sporulating period)
  • Fruit: Rounded to sharp-tipped cone-shaped terminal sporangia (producing green, spherical spores)

Habitat and Growing Conditions

  • Water Use: Moderate / High
  • Light: Full Sun / Part Shade
  • Soil: Sandy / Rocky / Wet, poorly-draining substrates
  • Habitat: Wash / Stream sides / Marshes / Moist riparian channels

Distribution

  • Distribution: Widespread throughout most of North America
  • Seen: Moist riparian wash edge
  • Elevation: 0 ft (0 m) to 9,800 ft (2,987 m)

Gallery

Smooth Horsetail (Equisetum laevigatum)

Ely, NV

Smooth Horsetail (Equisetum laevigatum)

Ely, NV

Smooth Horsetail (Equisetum laevigatum)

Ely, NV