BugwoodWiki Article

deeprooted sedge
Cyperus entrerianus Boeckl.


Cyperus entrerianus is a wetland sedge that invades disturbed areas throughout the southeastern United States. It is a robust, up to 40 in. (1.02 m) tall, grass-like plant with deeply set, thick rhizomes and dark purple to black leaf bases.
The leaves are basal, glossy, and flat or V-shaped. One of the identifying characteristics are the dark purple to black leaf bases.
The terminal inflorescence has 5-11 elongate rays ending in densely clustered, globose, greenish-white spikelets. The stem is distinctly three sided.
Fruits are brown achenes. Large plants can produce a million viable seeds a year. It also reproduces vegetatively through fragmentation and budding of rhizomes.
Ecological Threat
Cyperus entrerianus can invade wet undisturbed natural habitats as well as disturbed areas such as highway ditches and field margins. It can form monocultures, displacing native vegetation in habitats it invades. Construction, agricultural activities, and roadside mowing are spreading the seeds and dispersing this plant to new areas. It is tolerant of a wide range of soil types from sand to clay. Cyperus entrerianus is native to South America and was accidentally introduced into the United States around 1990. It invades disturbed areas through-out the southeastern United States.

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EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

EDDMapS Distribution

State Invasive List - This map identifies those states that list this species on their invasive species list. For more information, visit Invasive.org

State Invasives List

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Liliopsida
Subclass: Commelinidae
Order: Cyperales
Family: Cyperaceae
Genus: Cyperus

Other System Links

Plants: CYEN2
GRIN: 406742
ITIS: 501921

Synonyms and Other Names

Other Common Names:
woodrush flatsedge


Category: Grass or Grasslike
Category: Aquatic