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umbrella flatsedge

Scientific Name: Cyperus diandrus

Family: Cyperaceae

Category: Monocot

Growth: Graminoid

Duration: Annual

Other Names: PA (umbrella flatsedge), VT (low cyperus)

       

Umbrella Flat Sedge

Umbrella flat sedge is an ornamental grass often found near rivers and ponds. It is also considered a weed in some contexts, especially in rice production.

Considerations for Pets

  • The text mentions that Umbrella Flat Sedge can grow in clumps of plants, and reach heights of up to 16 inches. This could be a physical consideration if pets ingest parts of the plant.

Scientific Name and Taxonomy

  • Scientific Name: Cyperus alternifolius (Umbrella flatsedge), Cyperus diandrus (Umbrella flatsedge), Cyperus eragrostis
  • Family: Cyperaceae (Sedge Family)
  • Kingdom: Eukaryota
  • Synonyms: Chlorocyperus eragrostis (Lam.) Rikli, Cyperus declinatus Moench, Pycreus diander (Torr.) C.B. Clarke
  • USDA Symbol: CYDI3 (for Cyperus diandrus)

Common Names

  • Umbrella flat sedge
  • Umbrella Papyrus
  • Umbrella Grass
  • Umbrella Palm
  • Umbrella Sedge
  • Umbrella Flatsedge
  • Galingales
  • Flatsedges
  • Nutsedges
  • African sedge
  • Dwarf papyrus
  • Flat sedge
  • Umbrella plant
  • Drain Flat-sedge
  • American galingale
  • Palm branch sedge
  • Palm sedge
  • Palm leaf sedge

Distribution and Habitat

  • Native to Africa, Madagascar, Mauricius and The Runion island.
  • Found on moist to wet, sandy or peaty shorelines throughout New England.
  • Non-native to Florida.

Ecological Role

  • Can be an invasive species, escaping cultivation and becoming a weed.
  • A predominant sedge in rice production areas, such as Arkansas rice fields.

Morphological Characteristics

  • A tall grass that can grow up to 16 inches in height.
  • Grows in clumps.
  • The seed head has an umbrella shape.
  • Some species have stems that are circular in cross-section, while others are triangular.
  • Culm is tall and unbranched.

Flowering Time

  • Blooms from summer to fall.

Quirky Facts

  • Umbrella flat sedge is a close cousin of the papyrus plant of ancient Egypt.

Further Information

  • USDA Plants Database
  • The Plant List
  • ToL (Tree of Life Web Project)
  • BHL (Biodiversity Heritage Library)
  • WikiSpecies
  • Discover Life
  • Center for Aquatic Plants: http://plants.ifas.ufl.edu/cypalt.html