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Potamogeton nodosus
Potamogeton nodosus Poir.
Longleaf Pondweed, Knotty Pondweed
Potamogetonaceae (Pondweed Family)
Synonym(s): Potamogeton americanus, Potamogeton fluitans
USDA Symbol: PONO2
USDA Native Status: L48 (N), HI (N), PR (N), CAN (N)
Plant Characteristics
Duration: PerennialHabit: Herb
Breeding System: Flowers Bisexual
Fruit Type: Drupe
Size Notes: Leaves float on the surface of the water. Flower spikes rise up to about 6 inches above the surface of the water.
Leaf: Green
Fruit: Drupaceous.
Bloom Information
Bloom Color: White , GreenBloom Time: May , Jun , Jul , Aug , Sep , Oct
Distribution
USA: AL , AR , AZ , CA , CO , CT , DC , DE , FL , GA , HI , IA , ID , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , MT , NC , ND , NE , NH , NJ , NM , NV , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , UT , VA , VT , WA , WI , WV , WYCanada: NB , NS
Native Habitat: Partial to marginal to deepwater aquatic areas. Zones 7 - 11, with an indefinite range.
Growing Conditions
Water Use: HighLight Requirement: Sun , Part Shade
Soil Moisture: Wet
CaCO3 Tolerance: Low
Aquatic: yes
Conditions Comments: Use as oxygenator in water gardens. The variety P. crispus tolerates polluted water better than other oxygenators. Decorative, trailing habit in ponds. Grow in aquatic containers of sandy loam, root in muddy pool bottoms at depth of 6" - 24".
Benefit
Interesting Foliage: yesDeer Resistant: High
National Wetland Indicator Status
Region: | AGCP | AK | AW | CB | EMP | GP | HI | MW | NCNE | WMVE |
Status: | OBL | OBL | OBL | OBL | OBL | OBL | OBL | OBL | OBL |
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:Lady Bird Johnson Wildflower Center - Austin, TX
Bibliography
Bibref 841 - Native Alternatives to Invasive Plants (2006) Burrell, C. C.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
Additional resources
USDA: Find Potamogeton nodosus in USDA PlantsFNA: Find Potamogeton nodosus in the Flora of North America (if available)
Google: Search Google for Potamogeton nodosus
Metadata
Record Modified: 2023-02-23Research By: NPC