| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| POBI9 | Potamogeton bicupulatus Fern. | snailseed pondweed | Potamogetonaceae
|
| POBU6 | Potamogeton bupleuroides Fern. | Potamogeton perfoliatus | Potamogetonaceae
|
| POCAA5 | Potamogeton capillaceus Poir. var. atripes Fern. | Potamogeton diversifolius | Potamogetonaceae
|
| POCA36 | Potamogeton capillaceus Poir. p.p. | Potamogeton diversifolius | Potamogetonaceae
|
| POCL | Potamogeton clystocarpus Fern. | little aguja pondweed | Potamogetonaceae
|
| POCO18 | Potamogeton compressus auct. non L. | Potamogeton zosteriformis | Potamogetonaceae
|
| POCO12 | Potamogeton confervoides Reichenb. | Tuckerman's pondweed | Potamogetonaceae
|
| POCR3 | Potamogeton crispus L. | curly pondweed | Potamogetonaceae
|
| POCU10 | Potamogeton curtissii Morong | Potamogeton foliosus ssp. foliosus | Potamogetonaceae
|
| PODI10 | Potamogeton dimorphus Raf. | Potamogeton spirillus | Potamogetonaceae
|
| PODIM2 | Potamogeton diversifolius Raf. var. multidenticulatus (Morong) Aschers. & Graebn. | Potamogeton diversifolius | Potamogetonaceae
|
| PODIT | Potamogeton diversifolius Raf. var. trichophyllus Morong | Potamogeton bicupulatus | Potamogetonaceae
|
| PODI | Potamogeton diversifolius Raf. | waterthread pondweed | Potamogetonaceae
|
| POEPN | Potamogeton epihydrus Raf. ssp. nuttallii (Cham. & Schlecht.) Calder & Taylor | Potamogeton epihydrus | Potamogetonaceae
|
| POEPN2 | Potamogeton epihydrus Raf. var. nuttallii (Cham. & Schlecht.) Fern. | Potamogeton epihydrus | Potamogetonaceae
|
| POEPR | Potamogeton epihydrus Raf. var. ramosus (Peck) House | Potamogeton epihydrus | Potamogetonaceae
|
| POEP2 | Potamogeton epihydrus Raf. | ribbonleaf pondweed | Potamogetonaceae
|
| POFA | Potamogeton �faxonii Morong (pro sp.) | | Potamogetonaceae
|
| POFI8 | Potamogeton fibrillosus Fern. | Potamogeton foliosus ssp. fibrillosus | Potamogetonaceae
|
| POFIA | Potamogeton filiformis Pers. var. alpinus (Blytt) Aschers. & Graebn. | Stuckenia filiformis ssp. alpinus | Potamogetonaceae
|
| POFIB2 | Potamogeton filiformis Pers. var. borealis (Raf.) St. John | Stuckenia filiformis ssp. alpinus | Potamogetonaceae
|
| POFIL | Potamogeton filiformis Pers. var. latifolius (J.W. Robbins) Reveal | Stuckenia striatus | Potamogetonaceae
|
| POFIM2 | Potamogeton filiformis Pers. var. macounii Morong | Stuckenia filiformis ssp. alpinus | Potamogetonaceae
|
| POFIO | Potamogeton filiformis Pers. var. occidentalis (J.W. Robbins) Morong | Stuckenia filiformis ssp. occidentalis | Potamogetonaceae
|
| POFI2 | Potamogeton filiformis Pers. | Stuckenia filiformis ssp. filiformis | Potamogetonaceae
|
| POFL5 | Potamogeton floridanus Small | Florida pondweed | Potamogetonaceae
|
| POFL9 | Potamogeton fluitans Roth | Potamogeton nodosus | Potamogetonaceae
|
| POFOF5 | Potamogeton foliosus Raf. ssp. fibrillosus (Fern.) Haynes & C.B. Hellquist | leafy pondweed | Potamogetonaceae
|
| POFOF4 | Potamogeton foliosus Raf. ssp. foliosus | leafy pondweed | Potamogetonaceae
|
| POFOF | Potamogeton foliosus Raf. var. fibrillosus (Fern.) Haynes & Reveal | Potamogeton foliosus ssp. fibrillosus | Potamogetonaceae
|
| POFOG | Potamogeton foliosus Raf. var. genuinus Fern. | Potamogeton foliosus ssp. foliosus | Potamogetonaceae
|
| POFOM2 | Potamogeton foliosus Raf. var. macellus Fern. | Potamogeton foliosus ssp. foliosus | Potamogetonaceae
|
| POFO3 | Potamogeton foliosus Raf. | leafy pondweed | Potamogetonaceae
|
| POFR3 | Potamogeton friesii Rupr. | Fries' pondweed | Potamogetonaceae
|
| POGE3 | Potamogeton gemmiparus (J.W. Robbins) J.W. Robbins ex Morong | Potamogeton pusillus ssp. gemmiparus | Potamogetonaceae
|
| POGRG5 | Potamogeton gramineus L. var. graminifolius Fries | Potamogeton gramineus | Potamogetonaceae
|
| POGRM2 | Potamogeton gramineus L. var. maximus Morong | Potamogeton gramineus | Potamogetonaceae
|
| POGRM3 | Potamogeton gramineus L. var. myriophyllus J.W. Robbins | Potamogeton gramineus | Potamogetonaceae
|
| POGRT | Potamogeton gramineus L. var. typicus Ogden | Potamogeton gramineus | Potamogetonaceae
|
| POGR8 | Potamogeton gramineus L. | variableleaf pondweed | Potamogetonaceae
|
| POHA2 | Potamogeton �hagstroemii Benn. (pro sp.) | | Potamogetonaceae
|
| POHA11 | Potamogeton �haynesii Hellquist & Crow | | Potamogetonaceae
|
| POHE13 | Potamogeton heterophyllus Schreb. | Potamogeton illinoensis | Potamogetonaceae
|
| POHI4 | Potamogeton hillii Morong | Hill's pondweed | Potamogetonaceae
|
| POIL | Potamogeton illinoensis Morong | Illinois pondweed | Potamogetonaceae
|
| POIN9 | Potamogeton insulanus Hagstr. | tropical pondweed | Potamogetonaceae
|
| POIN15 | Potamogeton interior Rydb. | Stuckenia filiformis ssp. occidentalis | Potamogetonaceae
|
| POIN20 | Potamogeton interruptus Kit. | Stuckenia vaginatus | Potamogetonaceae
|
| POLA5 | Potamogeton lateralis Morong p.p. | Potamogeton pusillus ssp. pusillus | Potamogetonaceae
|
| POLA5 | Potamogeton lateralis Morong p.p. | Potamogeton vaseyi | Potamogetonaceae
|
| POLA6 | Potamogeton latifolius (J.W. Robbins) Morong | Stuckenia striatus | Potamogetonaceae
|
| POLO6 | Potamogeton longiligulatus Fern. | Potamogeton strictifolius | Potamogetonaceae
|
| POLU4 | Potamogeton lucens auct. non L. | Potamogeton illinoensis | Potamogetonaceae
|
| POMA43 | Potamogeton marianensis Cham. & Schlecht. | pondweed | Potamogetonaceae
|
| POMY | Potamogeton �mysticus Morong (pro sp.) | | Potamogetonaceae
|
| PONA4 | Potamogeton natans L. | floating pondweed | Potamogetonaceae
|
| PONE11 | Potamogeton �nericus Hagstr. | | Potamogetonaceae
|
| PONI5 | Potamogeton �nitens G.H. Weber (pro sp.) | | Potamogetonaceae
|
| PONO2 | Potamogeton nodosus Poir. | longleaf pondweed | Potamogetonaceae
|
| POOA | Potamogeton oakesianus J.W. Robbins | Oakes' pondweed | Potamogetonaceae
|
| POOB4 | Potamogeton oblongus Viviani | cinnamonspot pondweed | Potamogetonaceae
|
| POOB2 | Potamogeton obtusifolius Mert. & Koch | bluntleaf pondweed | Potamogetonaceae
|
| POOG | Potamogeton ogdenii Hellquist & Hilton | Ogden's pondweed | Potamogetonaceae
|
| POPAM | Potamogeton panormitanus Biv. var. major G. Fisch. | Potamogeton pusillus ssp. pusillus | Potamogetonaceae
|
| POPAM2 | Potamogeton panormitanus Biv. var. minor Biv. | Potamogeton pusillus ssp. pusillus | Potamogetonaceae
|
| POPA22 | Potamogeton panormitanus Biv. | Potamogeton pusillus ssp. pusillus | Potamogetonaceae
|
| POPE6 | Potamogeton pectinatus L. | Stuckenia pectinatus | Potamogetonaceae
|
| POPEB4 | Potamogeton perfoliatus L. ssp. bupleuroides (Fern.) Hult�n | Potamogeton perfoliatus | Potamogetonaceae
|
| POPER5 | Potamogeton perfoliatus L. ssp. richardsonii (Benn.) Hult�n | Potamogeton richardsonii | Potamogetonaceae
|
| POPEB2 | Potamogeton perfoliatus L. var. bupleuroides (Fern.) Farw. | Potamogeton perfoliatus | Potamogetonaceae
|
| POPER4 | Potamogeton perfoliatus L. var. richardsonii Benn. | Potamogeton richardsonii | Potamogetonaceae
|
| POPE7 | Potamogeton perfoliatus L. | claspingleaf pondweed | Potamogetonaceae
|
| POPI9 | Potamogeton pinnatum Walt. | Myriophyllum pinnatum | Haloragaceae
|
| POPO10 | Potamogeton polygonifolius Pourret | Potamogeton oblongus | Potamogetonaceae
|
| POPO17 | Potamogeton porsildiorum Fern. | Potamogeton subsibiricus | Potamogetonaceae
|
| POPO14 | Potamogeton porteri Fern. | Potamogeton hillii | Potamogetonaceae
|
| POPRA4 | Potamogeton praelongus Wulfen var. angustifolius Graebn. | Potamogeton praelongus | Potamogetonaceae
|
| POPR5 | Potamogeton praelongus Wulfen | whitestem pondweed | Potamogetonaceae
|
| POPU6 | Potamogeton pulcher Tuckerman | spotted pondweed | Potamogetonaceae
|
| POPUG4 | Potamogeton pusillus L. ssp. gemmiparus (J.W. Robbins) Haynes & C.B. Hellquist | small pondweed | Potamogetonaceae
|
| POPUP5 | Potamogeton pusillus L. ssp. pusillus | small pondweed | Potamogetonaceae
|
| POPUT3 | Potamogeton pusillus L. ssp. tenuissimus (Mert. & Koch) Haynes & C.B. Hellquist | small pondweed | Potamogetonaceae
|
| POPUG | Potamogeton pusillus L. var. gemmiparus J.W. Robbins | Potamogeton pusillus ssp. gemmiparus | Potamogetonaceae
|
| POPUM2 | Potamogeton pusillus L. var. minor (Biv.) Fern. & Schub. | Potamogeton pusillus ssp. pusillus | Potamogetonaceae
|
| POPUM3 | Potamogeton pusillus L. var. mucronatus (Fieber) Graebn. | Potamogeton pusillus ssp. tenuissimus | Potamogetonaceae
|
| POPUR2 | Potamogeton pusillus L. var. rutiloides (Fern.) Boivin | Potamogeton strictifolius | Potamogetonaceae
|
| POPUT | Potamogeton pusillus L. var. tenuissimus Mert. & Koch | Potamogeton pusillus ssp. tenuissimus | Potamogetonaceae
|
| POPU7 | Potamogeton pusillus L. | small pondweed | Potamogetonaceae
|
| PORE7 | Potamogeton �rectifolius Benn. | | Potamogetonaceae
|
| PORI2 | Potamogeton richardsonii (Benn.) Rydb. | Richardson's pondweed | Potamogetonaceae
|
| PORO2 | Potamogeton robbinsii Oakes | Robbins' pondweed | Potamogetonaceae
|
| PORU11 | Potamogeton rutilus auct. non Wolfgang | Potamogeton strictifolius | Potamogetonaceae
|
| POSC8 | Potamogeton �scoliophyllus Hagstr. | | Potamogetonaceae
|
| POSP5 | Potamogeton �sparganiifolius Laestad. ex Fries (pro sp.) | | Potamogetonaceae
|
| POSP4 | Potamogeton �spathuliformis (J.W. Robbins) Morong (pro sp.) | | Potamogetonaceae
|
| POSP3 | Potamogeton spirillus Tuckerman | spiral pondweed | Potamogetonaceae
|
| POST14 | Potamogeton striatus Ruiz & Pav�n | Stuckenia striatus | Potamogetonaceae
|
| POSTR | Potamogeton strictifolius Benn. var. rutiloides Fern. | Potamogeton strictifolius | Potamogetonaceae
|
| POSTT | Potamogeton strictifolius Benn. var. typicus Fern. | Potamogeton strictifolius | Potamogetonaceae
|
| POST2 | Potamogeton strictifolius Benn. | narrowleaf pondweed | Potamogetonaceae
|
| POSU7 | Potamogeton �subnitens Hagstr. | Potamogeton nitens | Potamogetonaceae
|