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Brundage, Stephanie

Scirpus cyperinus

Scirpus cyperinus (L.) Kunth

Woolgrass, Cottongrass Bulrush, Marsh Bulrush, Teddybear Paws

Cyperaceae (Sedge Family)

Synonym(s): Scirpus cyperinus var. condensatus, Scirpus cyperinus var. eriophorum, Scirpus cyperinus var. laxus, Scirpus cyperinus var. pelius, Scirpus cyperinus var. rubricosus, Scirpus eriophorum, Scirpus rubricosus

USDA Symbol: SCCY

USDA Native Status: L48 (N), CAN (N), SPM (N)

Cottongrass Bulrush or Woolgrass is a densely-tufted, clump-forming perennial, 3-6 ft. high, with an erect stem that is leafy up to the flower cluster. Many brown, woolly bristles surround the nutlets giving the cluster of spikelets in the terminal inflorescence a fuzzy appearance. A compound umbel, made up of many spikelets on branching rays, is at the top of a triangular or nearly round stem and is surrounded by spreading green, leaflike bracts; spikelets wooly in fruit.

This is one of several important species of wetland plants, many of them emergents, that provide food and cover for waterfowl and other wildlife. Nearly 30 species of Scirpus occur in eastern North America.

From the Image Gallery

23 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Grass/Grass-like
Root Type: Fibrous
Leaf Arrangement: Alternate
Leaf Venation: Parallel
Fruit Type: Achene
Size Notes: Up to about 6 feet tall.
Leaf: Green
Flower: Flowers in 6 to 12 inch clusters
Fruit: Brown to Yellow-brown

Bloom Information

Bloom Color: Green , Brown
Bloom Time: Jun , Jul , Aug , Sep

Distribution

USA: AL , AR , CT , DC , DE , FL , GA , IA , ID , IL , IN , KY , LA , MA , MD , ME , MI , MN , MO , MS , MT , NC , NH , NJ , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , VA , VT , WA , WI , WV
Canada: BC , NB , NL , NS , PE
Native Distribution: Nf. to Sask., s. to FL & e. TX
Native Habitat: Wet meadows & swamps

Growing Conditions

Water Use: High
Light Requirement: Sun
Soil Moisture: Wet
Soil pH: Acidic (pH<6.8) , Circumneutral (pH 6.8-7.2)
CaCO3 Tolerance: Medium
Aquatic: yes
Soil Description: Wet soil to standing water.

Benefit

Use Ornamental: The unusual flowers are attractive in moist gardens.
Use Wildlife: Seeds eaten by waterfowl. Roots eaten by muskrats and geese. Provides cover for nesting birds.
Use Other: Good for erosion control when planted en masse. Bulrush forms a buffer against wind and wave action, thus permitting other aquatic plants to grow in an otherwise unfavorable environment.
Conspicuous Flowers: yes
Attracts: Birds

Butterflies and Moths of North America (BAMONA)

Dion Skipper
(Euphyes dion)

Larval Host

Learn more at BAMONA

Propagation

Propagation Material: Root Division
Commercially Avail: yes

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:	OBL		OBL		FACW	OBL		OBL	OBL	OBL

This information is derived from: U.S. Army Corps of Engineers. (2023). 2022 National Wetland Plant List, version 3.6. U.S. Army Engineer Research and Development Center, Vicksburg, MS. https://wetland-plants.usace.army.mil/. Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Fredericksburg Nature Center - Fredericksburg, TX
Stengl Biological Research Station - Smithville, TX
NPSOT - Williamson County Chapter - Georgetown, TX

Bibliography

Bibref 118 - Field guide to venomous animals and poisonous plants, North America, north of Mexico (1994) Foster, S. & R. Caras
Bibref 869 - Healing Plants: Medicine of the Florida Seminole Indians (2001) Snow, A. M.; S. E. Stans
Bibref 461 - Illustrated companion to Gleason and Cronquist's Manual : illustrations of the vascular plants of Northeastern United States and adjacent Canada (2004) Holmgren, N.H. & P.K. Holmgren, A. Cronquist & H. ...
Bibref 511 - Vascular plants of Iowa : an annotated checklist and natural history (1994) Eilers, L. J. & D. M. Roosa

Search More Titles in Bibliography

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Research Literature

Reslit 137 - Seed bank response to wet heat and the vegetation structure of a Virginia pocosin (2007) J. F. Bolin
Reslit 53 - Primary Productivity in 20-year Old Created Wetlands in Southwestern Virginia (2010) R. B. Atkinson, J. E. Perry, G. B. Noe, W. L. Dani...
Reslit 52 - Plant decomposition and litter accumulation in depressional wetlands: Functional performance of two wetland age classes that were created via excavation (2001) R. B. Atkinson and J. Cairns
Reslit 337 - Growth of woolgrass in acid mine drainage (1999) M. Demchik and K. Garbutt
Reslit 709 - An Analysis of a Woolgrass (Scirpus cyperinus) Community in Wisconsin (1958) J. A. Kadlec
Reslit 710 - A Further Comment on Ecology of Woolgrass (Scirpus cyperinus) (1961) J. A. Kadlec
Reslit 724 - Differential nitrogen and phosphorus retention by five wetland plant species (2003) J. T. Kao, J. E. Titus and W. X. Zhu
Reslit 1509 - Selected Ecological Characteristics of Scirpus cyperinus and Its Role as an Invader of Disturbed Wetlands (1985) D. A. Wilcox, N. B. Pavlovic and M. L. Mueggler

This information was provided by the Florida WIldflower Foundation.
Search More Titles in Research Literature

Additional resources

USDA: Find Scirpus cyperinus in USDA Plants
FNA: Find Scirpus cyperinus in the Flora of North America (if available)
Google: Search Google for Scirpus cyperinus

Metadata

Record Modified: 2023-02-27
Research By: TWC Staff

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