Potamogeton pusillus var. tenuissimus

Family (Traditional)Potamogetonaceae
Species: Potamogeton pusillus
Infrapecies:Potamogeton pusillus Mert. & Koch var. tenuissimus
Common NameSmall pondweed
Growth Habitforb
Plant Notes**
CharacteristicsArmaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: Yes; Woody Herbaceous: Herbaceous; Duration: Perennial; General Ecology: Aquatic; Growth Habit: forb; Region of Origin: North America; Reproductive Phenology: May; Reproductive Phenology: June; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Leaf Arrangement: alternate; Leaf Arrangement: floating; Leaf Arrangement: opposite; Leaf Arrangement: submerged; Leaf Arrangement: subopposite; Leaf Complexity: simple; Leaf Dissection: 0; Leaf Fragrance: No; Leaf Persistance: Deciduous; Leaf Petiole Type: petiolate; Leaf Type: grass-like; Leaf Venation: parallel; Leaflet Margins: entire; Leaflet Number: 0; Anther Type: Basifixed; Base Flower Color: Brown (incl. Maroon); Base Flower Color: Green; Carpel Number/Pistil: 1; Fruit Dehiscence: No; Fruit Type: Achene; Fruit Type: Drupe; Fruit Wet/Dry: Dry; Fruit Wet/Dry: Wet; Hypanthium Present: No; Inflorescence Position: terminal; Inflorescence Types: spike; Ovary Position: Superior; Overall Flower Symmetry: Actinomorphic; Perianth Present: Yes; Petal Fusion: No; Petal Number: 0; Pistil Complexity: Simple; Pistil Number: 4; Placentation Type: Basal; Placentation Type: Marginal; Sepal Fusion: No; Sepal Number: 4; Sexuality: monoclinous; Sporangium Arrangement: N/A; Stamen Number: 4; Tepal Fusion: No; Tepal Number: 0
C value 8

** Not applicable or data not available.

Currently no photos are available for this plant.

Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display the its name. Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

  • State Boundaries
  • Counties
  • Counties - Species Present
  • Southeastern Plains
    • Blackland Prarie
  • Blue Ridge Mountains
  • Ridge and Valley
  • Cumberland Plateau
  • Cumberland Mountains
  • Allegheny Plateau
  • Interior Plateau
    • Bluegrass Region
    • Nashville Basin
    • Pennyroyal Karst Plain
    • Western Highland Rim
    • Eastern Highland Rim


SynonymFull Citation
Potamogeton berchtoldii Potamogeton berchtoldii Fieber
Potamogeton berchtoldii var. acuminatus Potamogeton berchtoldii var. acuminatus Fieber
Potamogeton berchtoldii var. berchtoldii Potamogeton berchtoldii var. berchtoldii
Potamogeton berchtoldii var. colpophilus Potamogeton berchtoldii var. colpophilus (Fern.) Fern.
Potamogeton berchtoldii var. lacunatus Potamogeton berchtoldii var. lacunatus (Hagstr.) Fern.
Potamogeton berchtoldii var. mucronatus Potamogeton berchtoldii var. mucronatus Fieber
Potamogeton berchtoldii var. polyphyllus Potamogeton berchtoldii var. polyphyllus (Morong) Fern.
Potamogeton berchtoldii var. tenuissimus Potamogeton berchtoldii var. tenuissimus (Mert. & Koch) Fern.
Potamogeton pusillus subsp. tenuissimus Potamogeton pusillus subsp. tenuissimus (Mert. & W. D. J. Koch) R. R. Haynes & Hellq.
Potamogeton pusillus var. mucronatus Potamogeton pusillus var. mucronatus (Fieber) Graebn.
Potamogeton pusillus var. tenuissimus Potamogeton pusillus var. tenuissimus Mert. & Koch

Specimens and Distribution

No specimens exist for this species.

Plant Photos