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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Schoenoplectus pungens var. pungens

Schoenoplectus pungens (Vahl) Palla var. pungens

Common Threesquare, Common Three-square

Cyperaceae (Sedge Family)

Synonym(s): Bolboschoenus maritimus var. polyphyllus, Schoenoplectus pungens var. polyphyllus, Scirpus americanus, Scirpus americanus var. polyphyllus, Scirpus pungens, Scirpus pungens var. polyphyllus


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


From the Image Gallery

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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: Dark Green
Fruit: Brown

Bloom Information

Bloom Color: Red , Green , Brown
Bloom Time: Mar , Apr , May , Jun , Jul , Aug


USA: AL , AR , CT , DC , DE , FL , GA , IL , IN , KY , LA , MA , MD , ME , MI , MN , MO , MS , NC , NH , NJ , NY , OH , PA , RI , SC , TN , VA , VT , WI , WV
Canada: MB , NB , NL , NS , ON , PE , QC , SK
Native Habitat: Fresh and brackish tidal and nontidal marshes, wet sandy shores, shallow water.

Growing Conditions

Water Use: High
Light Requirement: Sun
Soil Moisture: Wet
CaCO3 Tolerance: Medium
Soil Description: Clay, Loam, Sand


Attracts: Birds

Find Seed or Plants

Find seed sources for this species at the Native Seed Network.

From the National Organizations Directory

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

Native Seed Network - Corvallis, OR

Web Reference

Webref 57 - Atlas of Florida Plants (2020) Institute for Systematic Botany
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

Additional resources

USDA: Find Schoenoplectus pungens var. pungens in USDA Plants
FNA: Find Schoenoplectus pungens var. pungens in the Flora of North America (if available)
Google: Search Google for Schoenoplectus pungens var. pungens


Record Modified: 2023-06-08
Research By: TWC Staff

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