Cyperus esculentus

Species category

Weed

Common name

yellow nutsedge

Diagnostic characters

Planting unit

AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.

Shape

Three-sided obovateObovate:
Inverted egg shaped with apical end the broadest.

Size

  • Length 1.5 mm
  • Width 0.75 mm
  • Thickness 0.75 mm

Color

Brown

Texture

Smooth with interspersed honeycomb dots with dark borders

Other structures

Occasional style remnant, occasional enclosing bract.

Identification notes

AchenesAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.
are three-sided, borne between one or two bracts. The smooth surface is covered with underlying dots arranged in a honeycomb pattern.

Noxious weed seed categories

State Noxious Weed: Arizona, California, Colorado, Connecticut, Hawaii, Georgia (seed and tuber), Louisiana, Maine, Michigan, Mississippi, New Hampshire, New Mexico, North Carolina, Rhode Island, Tennessee, Texas

AOSA examination list

Included

More information

For more information, see ISMA fact sheet, Cyperus spp.

Nomenclature

Family

Cyperaceae

Valid name

Cyperus esculentus L.

 Cyperus esculentus.  Achenes are three-sided and are borne between one or two bracts.
Cyperus esculentus. Achenes are three-sided and are borne between one or two bracts.
 Cyperus esculentus.  Achenes are smooth with interspersed honeycomb dots with dark borders.
Cyperus esculentus. Achenes are smooth with interspersed honeycomb dots with dark borders.