Potamogeton nodosus Poir.
Knotty Pondweed, Longleaf pondweed
Potamogetonaceae (Pondweed Family)
Synonym(s): Potamogeton americanus, Potamogeton fluitans
USDA Symbol: PONO2
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Breeding System: Flowers Bisexual
Size Notes: 1-3
Size Class: 1-3 ft.
Bloom InformationBloom Color: White , Green
Bloom Time: May , Jun , Jul , Aug
DistributionUSA: 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 , WY
Canada: NB , NS
Native Habitat: Partial to marginal to deepwater aquatic areas. Zones 7 - 11, with an indefinite range.
Growing ConditionsWater Use: High
Light Requirement: Sun , Part Shade
Soil Moisture: Wet
CaCO3 Tolerance: Low
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.
BenefitInteresting Foliage: yes
Deer Resistant: High
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Lady Bird Johnson Wildflower Center - Austin, TX
BibliographyBibref 841 - Native Alternatives to Invasive Plants (2006) Burrell, C. C.
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Recommended Species Lists
Find native plant species by state. Each list contains commercially available species suitable for gardens and planned landscapes. Once you have selected a collection, you can browse the collection or search within it using the combination search.View Recommended Species page
Additional resourcesUSDA: Find Potamogeton nodosus in USDA Plants
FNA: Find Potamogeton nodosus in the Flora of North America (if available)
Google: Search Google for Potamogeton nodosus
MetadataRecord Modified: 2007-01-01
Research By: NPC