Cyperaceae (weeds)

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Cyperus retrorsus (click on image to enlarge it)
Author(s): Charles T. Bryson, USDA Agricultural Research Service
Source: IPM Images

Cyperaceae (weeds) - (sedge family)

The family of sedges contains more than 5,000 species of grass-like, hardy plants which are common in wet areas. It includes various species of weeds, for example purple nutsedge (Cyperus rotundus) or yellow nutsedge (Cyperus esculentus). The family is characterized, among others, by the stems having a triangular outline and being solid (not hollow). The leaf sheaths are closed. Like the grasses, they have minute wind-pollinated flowers.

The following genera are currently entered under this family: