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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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Eleocharis obtusa (Blunt spikerush)
San Antonio River Authority

Eleocharis obtusa

Eleocharis obtusa (Willd.) Schult.

Blunt Spikerush

Cyperaceae (Sedge Family)

Synonym(s): Eleocharis obtusa var. ellipsoidalis, Eleocharis obtusa var. gigantea, Eleocharis obtusa var. jejuna, Eleocharis obtusa var. obtusa, Eleocharis obtusa var. peasei, Eleocharis ovata var. obtusa, Scirpus obtusus

USDA Symbol: ELOB2

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

 

From the Image Gallery

1 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual
Habit: Grass/Grass-like
Root Type: Fibrous
Leaf Arrangement: Alternate
Leaf Venation: Parallel
Inflorescence: Spikelet , Terminal
Fruit Type: Achene
Size Notes: Up to about 3 feet tall.
Leaf: Dark Green

Bloom Information

Bloom Color: Green , Brown
Bloom Time: Jun , Jul , Aug , Sep , Oct , Nov
Bloom Notes: Perianth absent. Bloom time denotes fruiting period for Eleocharis spp.

Distribution

USA: AL , AR , CA , CO , CT , DC , DE , FL , GA , HI , IA , ID , IL , IN , KY , LA , MA , MD , ME , MI , MN , MO , MS , NC , NE , NH , NJ , NM , NV , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , VA , VT , WA , WI , WV , WY
Canada: NB , NS , PE

Growing Conditions

Water Use: Medium
Light Requirement: Sun
CaCO3 Tolerance: Medium

National Wetland Indicator Status

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: OBL OBL OBL OBL OBL OBL OBL OBL
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Herbarium Specimen(s)

NPSOT 0639 Collected Nov 1, 1993 in Bexar County by Mike Fox

1 specimen(s) available in the Digital Herbarium

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

Additional resources

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

Metadata

Record Modified: 2023-02-08
Research By: TWC Staff

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