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False Nutsedge
Cyperus strigosus

About False Nutsedge (Cyperus strigosus) Cyperus strigosus is a species of sedge known by the common names false nutsedge and straw-colored flatsedge. It is native to most of the United States and Canada, where it grows in wet areas in many habitat types, including disturbed and cultivated areas such as roadsides and crop fields. It is common and sometimes weedy. It is a perennial sedge growing up to 70 centimeters tall. The flower cluster is a cluster of many linear-shaped spikelets up to 3 centimeters long each. A few long, leaflike leafs grow at the base of the spike.
Plant Description
Plant Type

Max. Height
2.3 - 3.2 ft (0.7 - 1 m)


Growth Rate

Flower Color

Flowering Season

Native Status

Natural Setting
Site Type
Most places and pond edges

Sun, Part Shade

Elevation ?
13' - 5140'

Annual Precip. ?
3.6" - 78.8"

Summer Precip. ?
0.21" - 2.01"

Coldest Month ?
40.3° F - 59.4° F

Hottest Month ?
62.3° F - 88.2° F

Humidity ?
0.86 vpd - 40.09 vpd

Soil Description
Prefers loamy or clay soils. Grows poorly in sandy soils.

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Stawcolored Flatsedge, Straw-colored Flatsedge, Strawcolor Flatsedge, Strawcolor Nutgrass, Strawcolored Flatsedge, Strawcolored Nutgrass

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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