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Paspalum distichum (Knotgrass)
San Antonio River Authority

Paspalum distichum

Paspalum distichum L.


Poaceae (Grass Family)

Synonym(s): Digitaria paspaloides, Paspalum distichum var. indutum, Paspalum paspaloides

USDA Symbol: PADI6

USDA Native Status: L48 (N), HI (I), PR (N), VI (N)

Knotgrass is a member of the grass family (family Poaceae). Grasses are herbs, rarely woody, with cylindrical, jointed flowering stems (culms), hollow between the joints, leaves often mostly basal and tiny flowers aggregated into highly modified clusters.


From the Image Gallery

1 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Grass/Grass-like
Root Type: Fibrous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Venation: Parallel
Inflorescence: Panicle
Fruit Type: Caryopsis
Size Notes: Up to about 2 feet tall.
Leaf: Green

Bloom Information

Bloom Color: Green
Bloom Time: Jul , Aug


USA: AL , AR , AZ , CA , FL , GA , HI , ID , KS , KY , LA , MD , MS , NC , NJ , NM , NV , OK , OR , PA , SC , TN , TX , UT , VA , WA

Growing Conditions

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

Butterflies and Moths of North America (BAMONA)

Sunrise Skipper
(Adopaeoides prittwitzi)

Larval Host
Learn more at BAMONA

National Wetland Indicator Status

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 1046 Collected Jun 5, 1995 in Bexar County by Mike Fox

1 specimen(s) available in the Digital Herbarium


Bibref 1186 - Field Guide to Moths of Eastern North America (2005) Covell, C.V., Jr.
Bibref 1185 - Field Guide to Western Butterflies (Peterson Field Guides) (1999) Opler, P.A. and A.B. Wright

Search More Titles in Bibliography

Additional resources

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


Record Modified: 2012-07-02
Research By: TWC Staff

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