| Common Name | Scientific Name | Code |
| n/a | Potamogeton ?argutulus Hagstr. [gramineus ? nodosus] | POAR9 |
| n/a | Potamogeton ?bottnicus Hagstr. [excluded] | POBO11 |
| n/a | Potamogeton ?cooperi (Fryer) Fryer [excluded] | POCO42 |
| n/a | Potamogeton ?faxonii Morong (pro sp.) [illinoensis ? nodosus] | POFA |
| n/a | Potamogeton ?gessnacensis Fisch. [excluded] | POGE10 |
| n/a | Potamogeton ?griffithii Benn. (pro sp.) [alpinus ? praelongus] | POGR27 |
| n/a | Potamogeton ?hagstroemii Benn. (pro sp.) [gramineus ? richardsonii] | POHA2 |
| n/a | Potamogeton ?haynesii Hellquist & Crow [strictifolius ? zosteriformis] | POHA11 |
| n/a | Potamogeton ?kochii Schultz [excluded] | POKO2 |
| n/a | Potamogeton ?mysticus Morong (pro sp.) [perfoliatus ? pusillus] | POMY |
| n/a | Potamogeton ?nericus Hagstr. [alpinus ? gramineus] | PONE11 |
| n/a | Potamogeton ?nitens G.H. Weber (pro sp.) [gramineus ? perfoliatus] | PONI5 |
| n/a | Potamogeton ?prussicus Hagstr. [alpinus ? perfoliatus] | POPR20 |
| n/a | Potamogeton ?pusilliformis Fisch. [excluded] | POPU21 |
| n/a | Potamogeton ?rectifolius Benn. [nodosus ? richardsonii] | PORE7 |
| n/a | Potamogeton ?scoliophyllus Hagstr. [amplifolius ? illinoensis] | POSC8 |
| n/a | Potamogeton ?semenii Aschers. & Graebn. [excluded] | POSE18 |
| n/a | Potamogeton ?semifructus Bennett ex Aschers. & Graebn. [excluded] | POSE61 |
| n/a | Potamogeton ?sparganiifolius Laestad. ex Fries (pro sp.) [gramineus ? natans] | POSP5 |
| n/a | Potamogeton ?spathuliformis (J.W. Robbins) Morong (pro sp.) [gramineus ? illinoensis] | POSP4 |
| n/a | Potamogeton ?subobtusus Hagstr. [alpinus ? nodosus] | POSU24 |
| n/a | Potamogeton ?subsessilis Hagstr. [epihydrus ? nodosus] | POSU9 |
| n/a | Potamogeton ?undulatus Wolfgang ex J.A. & J.H. Schultes (pro sp.) [excluded] | POUN7 |
| n/a | Potamogeton ?vilnensis Galinis. [excluded] | POVI24 |
| alpine pondweed | Potamogeton alpinus Balbis | POAL8 |
| bluntleaf pondweed | Potamogeton obtusifolius Mert. & Koch | POOB2 |
| broadleaf pondweed | Stuckenia striata (Ruiz & Pav?n) Holub | STST20 |
| cinnamonspot pondweed | Potamogeton oblongus Viviani | POOB4 |
| claspingleaf pondweed | Potamogeton perfoliatus L. | POPE7 |
| curly pondweed | Potamogeton crispus L. | POCR3 |
| fineleaf pondweed | Stuckenia filiformis (Pers.) B?erner | STFI6 |
| fineleaf pondweed | Stuckenia filiformis (Pers.) B?erner ssp. alpina (Blytt) Haynes, D.H. Les, & M. Kral | STFIA2 |
| fineleaf pondweed | Stuckenia filiformis (Pers.) B?erner ssp. filiformis | STFIF |
| flatstem pondweed | Potamogeton zosteriformis Fern. | POZO |
| floating pondweed | Potamogeton natans L. | PONA4 |
| Florida pondweed | Potamogeton floridanus Small | POFL5 |
| Fries's pondweed | Potamogeton friesii Rupr. | POFR3 |
| Hill's pondweed | Potamogeton hillii Morong | POHI4 |
| Illinois pondweed | Potamogeton illinoensis Morong | POIL |
| largeleaf pondweed | Potamogeton amplifolius Tuckerman | POAM5 |
| leafy pondweed | Potamogeton foliosus Raf. | POFO3 |
| leafy pondweed | Potamogeton foliosus Raf. ssp. fibrillosus (Fern.) Haynes & C.B. Hellquist | POFOF5 |
| leafy pondweed | Potamogeton foliosus Raf. ssp. foliosus | POFOF4 |
| little aguja pondweed | Potamogeton clystocarpus Fern. | POCL |
| longleaf pondweed | Potamogeton nodosus Poir. | PONO2 |
| narrowleaf pondweed | Potamogeton strictifolius Benn. | POST2 |
| Oakes's pondweed | Potamogeton oakesianus J.W. Robbins | POOA |
| Ogden's pondweed | Potamogeton ogdenii Hellquist & Hilton | POOG |
| pondweed | Potamogeton L. | POTAM |
| pondweed | Potamogeton marianensis Cham. & Schlecht. | POMA43 |
| pondweed | Stuckenia B?erner | STUCK |
| Potamogeton ?cooperi | Potamogeton ?cymatodes Aschers. & Graebn. [excluded] | POCY6 |
| Potamogeton ?kochii | Potamogeton ?spathulatus Schrad. ex Koch & Ziz [excluded] | POSP17 |
| Potamogeton ?nitens | Potamogeton ?subnitens Hagstr. | POSU7 |
| Potamogeton ?pusilliformis | Potamogeton ?intermedius Fisch. [excluded] | POIN32 |
| Potamogeton ?spathuliformis | Potamogeton varians Morong | POVA10 |
| Potamogeton alpinus | Potamogeton alpinus Balbis ssp. tenuifolius (Raf.) Hult | POALT3 |
| Potamogeton alpinus | Potamogeton alpinus Balbis var. subellipticus (Fern.) Ogden | POALS2 |
| Potamogeton alpinus | Potamogeton alpinus Balbis var. tenuifolius (Raf.) Ogden | POALT2 |
| Potamogeton bicupulatus | Potamogeton diversifolius Raf. var. trichophyllus Morong | PODIT |
| Potamogeton diversifolius | Potamogeton capillaceus Poir. p.p. | POCA36 |
| Potamogeton diversifolius | Potamogeton capillaceus Poir. var. atripes Fern. | POCAA5 |
| Potamogeton diversifolius | Potamogeton diversifolius Raf. var. multidenticulatus (Morong) Aschers. & Graebn. | PODIM2 |
| Potamogeton epihydrus | Potamogeton epihydrus Raf. ssp. nuttallii (Cham. & Schlecht.) Calder & Taylor | POEPN |
| Potamogeton epihydrus | Potamogeton epihydrus Raf. var. nuttallii (Cham. & Schlecht.) Fern. | POEPN2 |
| Potamogeton epihydrus | Potamogeton epihydrus Raf. var. ramosus (Peck) House | POEPR |
| Potamogeton foliosus | Potamogeton foliosus Raf. var. foliosus Raf. [superfluous autonym] | POFOF6 |
| Potamogeton foliosus ssp. fibrillosus | Potamogeton fibrillosus Fern. | POFI8 |
| Potamogeton foliosus ssp. fibrillosus | Potamogeton foliosus Raf. var. fibrillosus (Fern.) Haynes & Reveal | POFOF |
| Potamogeton foliosus ssp. foliosus | Potamogeton curtissii Morong | POCU10 |
| Potamogeton foliosus ssp. foliosus | Potamogeton foliosus Raf. var. genuinus Fern. | POFOG |
| Potamogeton foliosus ssp. foliosus | Potamogeton foliosus Raf. var. macellus Fern. | POFOM2 |
| Potamogeton gramineus | Potamogeton gramineus L. var. graminifolius Fries | POGRG5 |
| Potamogeton gramineus | Potamogeton gramineus L. var. maximus Morong | POGRM2 |
| Potamogeton gramineus | Potamogeton gramineus L. var. myriophyllus J.W. Robbins | POGRM3 |
| Potamogeton gramineus | Potamogeton gramineus L. var. typicus Ogden | POGRT |
| Potamogeton hillii | Potamogeton porteri Fern. | POPO14 |
| Potamogeton illinoensis | Potamogeton angustifolius Bercht. & K. Presl | POAN10 |
| Potamogeton illinoensis | Potamogeton heterophyllus Schreb. | POHE13 |
| Potamogeton illinoensis | Potamogeton lucens auct. non L. [misapplied] | POLU4 |
| Potamogeton nodosus | Potamogeton americanus Cham. & Schlecht. | POAM11 |
| Potamogeton nodosus | Potamogeton fluitans Roth | POFL9 |
| Potamogeton oblongus | Potamogeton polygonifolius Pourret | POPO10 |
| Potamogeton perfoliatus | Potamogeton amplexicaulis Kar. | POAM10 |
| Potamogeton perfoliatus | Potamogeton bupleuroides Fern. | POBU6 |
| Potamogeton perfoliatus | Potamogeton perfoliatus L. ssp. bupleuroides (Fern.) Hult | POPEB4 |
| Potamogeton perfoliatus | Potamogeton perfoliatus L. var. bupleuroides (Fern.) Farw. | POPEB2 |
| Potamogeton praelongus | Potamogeton praelongus Wulfen var. angustifolius Graebn. | POPRA4 |
| Potamogeton pusillus | Potamogeton pusillus L. var. pusillus L. [superfluous autonym] | POPUP9 |
| Potamogeton pusillus ssp. gemmiparus | Potamogeton gemmiparus (J.W. Robbins) J.W. Robbins ex Morong | POGE3 |
| Potamogeton pusillus ssp. gemmiparus | Potamogeton pusillus L. var. gemmiparus J.W. Robbins | POPUG |
| Potamogeton pusillus ssp. pusillus | Potamogeton lateralis Morong p.p. | POLA5 |
| Potamogeton pusillus ssp. pusillus | Potamogeton panormitanus Biv. | POPA22 |
| Potamogeton pusillus ssp. pusillus | Potamogeton panormitanus Biv. var. major G. Fisch. | POPAM |
| Potamogeton pusillus ssp. pusillus | Potamogeton panormitanus Biv. var. minor Biv. | POPAM2 |
| Potamogeton pusillus ssp. pusillus | Potamogeton pusillus L. var. minor (Biv.) Fern. & Schub. | POPUM2 |
| Potamogeton pusillus ssp. tenuissimus | Potamogeton berchtoldii Fieber | POBE9 |
| Potamogeton pusillus ssp. tenuissimus | Potamogeton berchtoldii Fieber var. acuminatus Fieber | POBEA |
| Potamogeton pusillus ssp. tenuissimus | Potamogeton berchtoldii Fieber var. colpophilus (Fern.) Fern. | POBEC |
| Potamogeton pusillus ssp. tenuissimus | Potamogeton berchtoldii Fieber var. lacunatus (Hagstr.) Fern. | POBEL |
| Potamogeton pusillus ssp. tenuissimus | Potamogeton berchtoldii Fieber var. mucronatus Fieber | POBEM |
| Potamogeton pusillus ssp. tenuissimus | Potamogeton berchtoldii Fieber var. polyphyllus (Morong) Fern. | POBEP |
| Potamogeton pusillus ssp. tenuissimus | Potamogeton berchtoldii Fieber var. tenuissimus (Mert. & Koch) Fern. | POBET |
| Potamogeton pusillus ssp. tenuissimus | Potamogeton pusillus L. var. mucronatus (Fieber) Graebn. | POPUM3 |
| Potamogeton pusillus ssp. tenuissimus | Potamogeton pusillus L. var. tenuissimus Mert. & Koch | POPUT |
| Potamogeton richardsonii | Potamogeton perfoliatus L. ssp. richardsonii (Benn.) Hult | POPER5 |
| Potamogeton richardsonii | Potamogeton perfoliatus L. var. richardsonii Benn. | POPER4 |
| Potamogeton spirillus | Potamogeton dimorphus Raf. | PODI10 |
| Potamogeton strictifolius | Potamogeton longiligulatus Fern. | POLO6 |
| Potamogeton strictifolius | Potamogeton pusillus L. var. rutiloides (Fern.) Boivin | POPUR2 |
| Potamogeton strictifolius | Potamogeton rutilus auct. non Wolfgang [misapplied] | PORU11 |
| Potamogeton strictifolius | Potamogeton strictifolius Benn. var. rutiloides Fern. | POSTR |
| Potamogeton strictifolius | Potamogeton strictifolius Benn. var. typicus Fern. | POSTT |
| Potamogeton subsibiricus | Potamogeton porsildiorum Fern. | POPO17 |
| Potamogeton vaseyi | Potamogeton lateralis Morong p.p. | POLA5 |
| Potamogeton zosteriformis | Potamogeton compressus auct. non L. [misapplied] | POCO18 |
| Potamogeton zosteriformis | Potamogeton zosterifolius Schumacher ssp. zosteriformis (Fern.) Hult | POZOZ |
| ribbonleaf pondweed | Potamogeton epihydrus Raf. | POEP2 |
| Richardson's pondweed | Potamogeton richardsonii (Benn.) Rydb. | PORI2 |
| Robbins's pondweed | Potamogeton robbinsii Oakes | PORO2 |
| sago pondweed | Stuckenia pectinata (L.) B?erner | STPE15 |
| sheathed pondweed | Stuckenia vaginata (Turcz.) Holub | STVA8 |
| small pondweed | Potamogeton pusillus L. | POPU7 |
| small pondweed | Potamogeton pusillus L. ssp. gemmiparus (J.W. Robbins) Haynes & C.B. Hellquist | POPUG4 |
| small pondweed | Potamogeton pusillus L. ssp. pusillus | POPUP5 |
| small pondweed | Potamogeton pusillus L. ssp. tenuissimus (Mert. & Koch) Haynes & C.B. Hellquist | POPUT3 |
| snailseed pondweed | Potamogeton bicupulatus Fern. | POBI9 |
| spiral pondweed | Potamogeton spirillus Tuckerman | POSP3 |
| spotted pondweed | Potamogeton pulcher Tuckerman | POPU6 |
| Stuckenia filiformis ssp. alpina | Coleogeton filiformis (Pers.) D.H. Les & Haynes ssp. alpinus (Blytt) D.H. Les & Haynes | COFIA |
| Stuckenia filiformis ssp. alpina | Potamogeton filiformis Pers. var. alpinus (Blytt) Aschers. & Graebn. | POFIA |
| Stuckenia filiformis ssp. alpina | Potamogeton filiformis Pers. var. borealis (Raf.) St. John | POFIB2 |
| Stuckenia filiformis ssp. alpina | Potamogeton filiformis Pers. var. macounii Morong | POFIM2 |
| Stuckenia filiformis ssp. alpina | Stuckenia filiformis (Pers) Boerner ssp. alpinus (Blytt) Haynes, D.H. Les, & M. Kral [orthographic variant] | STFIA |
| Stuckenia filiformis ssp. alpina | Stuckenia filiformis (Pers.) B?erner var. alpina (Blytt) Dorn | STFIA3 |
| Stuckenia filiformis ssp. filiformis | Coleogeton filiformis (Pers.) D.H. Les & Haynes | COFI6 |
| Stuckenia filiformis ssp. filiformis | Potamogeton filiformis Pers. | POFI2 |
| Stuckenia filiformis ssp. occidentalis | Coleogeton filiformis (Pers.) D.H. Les & Haynes ssp. occidentalis (J.W. Robbins) D.H. Les & Haynes | COFIO |
| Stuckenia filiformis ssp. occidentalis | Potamogeton filiformis Pers. var. occidentalis (J.W. Robbins) Morong | POFIO |
| Stuckenia filiformis ssp. occidentalis | Potamogeton interior Rydb. | POIN15 |
| Stuckenia filiformis ssp. occidentalis | Stuckenia filiformis (Pers.) B?erner var. occidentalis (J.W. Robbins) Dorn | STFIO2 |
| Stuckenia pectinata | Coleogeton pectinatus (L.) D.H. Les & Haynes | COPE9 |
| Stuckenia pectinata | Potamogeton pectinatus L. | POPE6 |
| Stuckenia pectinata | Stuckenia pectinatus (L.) Boerner [orthographic variant] | STPE12 |
| Stuckenia striata | Potamogeton filiformis Pers. var. latifolius (J.W. Robbins) Reveal | POFIL |
| Stuckenia striata | Potamogeton latifolius (J.W. Robbins) Morong | POLA6 |
| Stuckenia striata | Potamogeton striatus Ruiz & Pav?n | POST14 |
| Stuckenia striata | Stuckenia striatus (Ruiz & Pav?n) Holub [orthographic variant] | STST18 |
| Stuckenia vaginata | Coleogeton vaginatus (Turcz.) D.H. Les & Haynes | COVA9 |
| Stuckenia vaginata | Potamogeton interruptus Kit. | POIN20 |
| Stuckenia vaginata | Potamogeton vaginatus Turcz. | POVA2 |
| Stuckenia vaginata | Stuckenia vaginatus (Turcz.) Holub [orthographic variant] | STVA5 |
| Tennessee pondweed | Potamogeton tennesseensis Fern. | POTE4 |
| tropical pondweed | Potamogeton insulanus Hagstr. | POIN9 |
| Tuckerman's pondweed | Potamogeton confervoides Reichenb. | POCO12 |
| variableleaf pondweed | Potamogeton gramineus L. | POGR8 |
| Vasey's pondweed | Potamogeton vaseyi J.W. Robbins | POVA3 |
| waterthread pondweed | Potamogeton diversifolius Raf. | PODI |
| western fineleaf pondweed | Stuckenia filiformis (Pers.) B?erner ssp. occidentalis (J.W. Robbins) Haynes, D.H. Les, & M. Kral | STFIO |
| whitestem pondweed | Potamogeton praelongus Wulfen | POPR5 |
| Yenisei River pondweed | Potamogeton subsibiricus Hagstr. | POSU4 |