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Red Rooted Cyperus Back to Plant Page
Cyperus erythrorhizos

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About Red Rooted Cyperus (Cyperus erythrorhizos) Cyperus erythrorhizos is a species of sedge known by the common name redroot flatsedge. It is found throughout North America from central Canada to central Mexico. It is a plant of wet areas such as rivers and ditches, generally at low elevations. It gets its common and scientific names from the red color of its roots. This sedge grows to a maximum of a meter in height, but is usually quite a bit shorter. It may have a number of long, wispy leaves around the base of the plant. The flower cluster may contain one to several spikes, each spike containing 20 to over 100 spikelets. Each spikelet is light greenish brown to reddish brown and is made up of up to 30 leafed flowers. The fruit is a glossy achene about a millimeter long.
Plant Description
Plant Type

Max. Height
2.5 - 3.3 ft (0.8 - 1 m)


Growth Rate

Flower Color

Flowering Season

Native Status

Natural Setting
Site Type
Riverbanks, shores and wet places


Elevation ?
-165' - 5342'

Annual Precip. ?
2.5" - 64.8"

Summer Precip. ?
0.14" - 2.02"

Coldest Month ?
36.5° F - 60.1° F

Hottest Month ?
65.4° F - 88.6° F

Humidity ?
0.41 vpd - 40.17 vpd

Soil Description
Prefers sandy or loamy soils. Does not grow well in clay soils.

Landscaping Information
Nursery Availability
Rarely Available

Other Names
Common Names
Redroot Flatsedge

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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