Cyperus entrerianus, Deeprooted Sedge

Gardens & Landscapes, Invasive Species, Extension Master Gardener November 13, 2015 Print Friendly and PDF

Invasive Species: Cyperus entrerianus, Deeprooted Sedge

Deeprooted sedge is a wetland sedge that invades disturbed areas throughout the southeastern United States. It is a robust, up to 40 in. (102 cm) 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. The terminal inflorescence has 5 to 11 elongate rays ending in densely clustered spikelets. A large plant can produce one million viable seeds a year. Deeprooted sedge invades wet, disturbed areas such as highway ditches and field margins, where it can displace native vegetation. Construction, agricultural activities, and roadside mowing are spreading the seeds and dispersing this plant to new areas. Deeprooted sedge is native to South America and was accidentally introduced into the United States around 1990.

What are invasive species and why should we be concerned about them? 


Taxonomy: Scientific and Common Names for This Species

Cyperales > Cyperaceae > Cyperus entrerianus Boeckl.

Synonym(s): woodrush flatsedge

Cyperus entrerianus - USDA PLANTS Profile

Distribution Maps

Deeprooted sedge - The reported distribution of this invasive species across the United States. (Source: Invasive Plant Atlas of the United States)

Up-to-the-minute distribution maps and why they are important 

Reporting This Invasive Species

What is the best way and place to report the occurrence of an invasive species? 

 How to report an invasive species sighting to EDDMapS - Early Detection & Distribution Mapping System

EDDMapS - Report an invasive species to EDDMapS

County Extension Offices - Find your local Cooperative Extension office on this map provided by USDA

How to Identify

This invasive species can be identified by looking for the characteristics described in the paragraphs that follow.

Plant

It is a robust, up to 40 in. (102 cm) tall, grass-like plant with deeply set, thick rhizomes and dark purple to black leaf bases.

deeprooted sedge (Cyperus entrerianus) deeprooted sedge
Charles T. Bryson, USDA Agricultural Service, bugwood.org Richard Carter, Valdosta State University, bugwood.org

Foliage

The leaves are basal, glossy, and flat or V-shaped.

deeprooted sedge deeprooted sedge
Charles T. Bryson, USDA Agricultural Service,   bugwood.org Charles T. Bryson, USDA Agricultural Service,   bugwood.org

Flower

The terminal inflorescence has 5 to 11 elongate rays ending in densely clustered spikelets.

deeprooted sedge deeprooted sedge (Cyperus entrerianus)
Charles T. Bryson, USDA Agricultural Service,   bugwood.org Richard Carter, Valdosta State University,   bugwood.org

Fruit

A large plant can produce one million viable seeds a year. It also spreads by rhizomes and division of the plant.

deeprooted sedge deeprooted sedge
Charles T. Bryson, USDA Agricultural Service,   bugwood.org Charles T. Bryson, USDA Agricultural Service,   bugwood.org

Native Species That Can Resemble Deeprooted Sedge

Cyperus erythrorhizos, redroot flatsedge - Images at invasive.org

redroot flatsedge (Cyperus erythrorhizos) redroot flatsedge (Cyperus erythrorhizos)
Richard Carter, Valdosta State University, bugwood.org Richard Carter, Valdosta State University, bugwood.org

 

Cyperus odoratus, flatsedge - Images at invasive.org

flatsedge

flatsedge

Graves Lovell, Alabama Department of
Conservation and Natural Resources, 
bugwood.org

James H. Miller & Ted Bodner, Southern Weed Science Society, bugwood.org

 

Additional Images for Deeprooted Sedge

Deeprooted sedge - Images at Invasive.org

Additional Information, Biology, Control and Management Resources

Control and management recommendations vary according to individual circumstances. Location, habitat, weather, and a variety of other conditions are factors that help determine the best treatment choice. To find the safest and most effective treatment for your situation, consult your state's land-grant institution. If you will use chemicals as part of the control process, always refer to the product label.

United States Land-Grant University System - Find your land-grant university's college of agriculture, Cooperative Extension office, or other related partner on this map provided by USDA.

Deeprooted Sedge - An Overlooked Aggressive Weed in the Southeastern U.S. - Invasive Plants of the Eastern U.S.: Identification and Control

Control/Suppression of Deeprooted Sedge - Invasive Plants of the Eastern U.S.: Identification and Control

Invasives Database - TexasInvasives.org


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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.