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Schweinitz's flatsedge

Scientific Name: Cyperus schweinitzii

Family: Cyperaceae

Category: Monocot

Growth: Graminoid

Duration: Perennial

Other Names: NY (Schweinitz's flatsedge), PA (Schweinitz's flat

       

Schweinitz's Flatsedge (Cyperus schweinitzii)

Cyperus schweinitzii, commonly known as Schweinitz's flatsedge, is a perennial plant belonging to the sedge family.

Taxonomy and Nomenclature

  • Scientific Name: Cyperus schweinitzii Torr.
  • Common Names: Schweinitz's flatsedge, Schweinitz's umbrella sedge, Sand Flat Sedge, Great Plains sand sedge, Rough Sand Sedge, Sand Nut Grass, Schweinitz's flat sedge, Schweinitz's cyperus
  • Family: Cyperaceae (Sedge Family)
  • Synonyms: Cyperus schweinitzii var. uberior, Cyperus mesochoreus

Distribution and Habitat

  • Native to much of North America.
  • Introduced to New England.
  • Collected once in Massachusetts from a freight yard.
  • Occupies sites with exposed, sandy soil.

Morphological Characteristics

  • Perennial, growing to 0.8 m (2ft 7in).
  • Culms (stems): Erect or ascending, 3-sided, usually rough near the tip.
  • Leaves: Usually flat but edges occasionally rolled under, seldom reaching the culm tip.

Ecological Role

  • A good example of a plant that can seed bank for many years.
  • Found in the Albany Pine Bush.
  • Listed as a Special Concern Species (SCP) in some regions.

Quirky Facts

  • The species is named after Lewis David de Schweinitz (1780-1834), the botanist who discovered it.