| Isoetes acadiensis Kott |
Accepted |
22 |
| Isoetes andicola (Amstutz) L. D. Gómez |
Accepted |
22 |
| Isoetes appalachiana D. F. Brunt. & D. M. Britton |
Accepted |
22 |
| Isoetes asiatica Makino |
Accepted |
11 |
| Isoetes boliviensis U. Weber |
Accepted |
11 |
| Isoetes boomii Luebke |
Accepted |
33 |
| Isoetes butleri Engelm. |
Accepted |
11 |
| Isoetes caroliniana (A. A. Eaton) Luebke |
Accepted |
11 |
| Isoetes echinospora Durieu |
Accepted |
11 |
| Isoetes engelmannii A. Braun |
Accepted |
11 |
| Isoetes eshbaughii Hickey |
Accepted |
22 |
| Isoetes flaccida A. Braun |
Accepted |
11 |
| Isoetes georgiana Luebke |
Accepted |
33 |
| Isoetes herzogii U. Weber |
Accepted |
22 |
| Isoetes hyemalis D. F. Brunt. |
Accepted |
22 |
| Isoetes hypsophila H. -Mazz. |
Accepted |
11 |
| Isoetes karstenii A. Braun |
Accepted |
11 |
| Isoetes lacustris L. |
Accepted |
55 |
| Isoetes louisianensis Thieret |
Accepted |
22 |
| Isoetes maritima Underw. |
Accepted |
22 |
| Isoetes melanopoda Gay & Durieu |
Accepted |
11 |
| Isoetes melanospora Engelm. |
Accepted |
11 |
| Isoetes novo-granadensis H. P. Fuchs |
Accepted |
66 |
| Isoetes occidentalis L. F. Hend. |
Accepted |
33 |
| Isoetes orientalis H. Liu & W. Q. F. |
Accepted |
33 |
| Isoetes palmeri H. P. Fuchs |
Accepted |
22 |
| Isoetes precocia R. L. Small & Hickey |
Accepted |
11 |
| Isoetes prototypus D. M. Britton |
Accepted |
11 |
| Isoetes riparia Engelm. ex A. Braun |
Accepted |
22 |
| Isoetes setacea Lam. |
Accepted |
11 |
| Isoetes sinensis Palmer |
Accepted |
22 |
| Isoetes storkii T. C. Palmer |
Accepted |
11 |
| Isoetes taiwanensis D. Vol |
Accepted |
11 |
| Isoetes tegetiformans Rury |
Accepted |
11 |
| Isoetes truncata (A. A. Eaton) Clute |
Accepted |
33 |
| Isoetes tuckermanii A. Braun ex Engelm. |
Accepted |
22 |
| Isoetes virginica N. Pfeiff. |
Accepted |
22 |
| Isoetes alcalophila Halloy |
Unresolved |
11 |
| Isoetes alpina Kirk |
Unresolved |
11 |
| Isoetes australis R. O. Williams |
Unresolved |
22 |
| Isoetes azorica Durieu ex Milde |
Unresolved |
22 |
| Isoetes brittonii D. F. Brunt. & W. C. Taylor |
Unresolved |
None |
| Isoetes bruntonii D. A. Knepper & Musselman |
Unresolved |
None |
| Isoetes carltaylori Musselman |
Unresolved |
None |
| Isoetes delilei Rothm. |
Unresolved |
11 |
| Isoetes drummondii A. Braun |
Unresolved |
11 |
| Isoetes echtuckeri D. F. Brunt. & D. M. Britton |
Unresolved |
None |
| Isoetes fairbrothersii J. D. Montgomery & W. C. Taylor |
Unresolved |
33 |
| Isoetes gunnii A. Braun |
Unresolved |
11 |
| Isoetes humilior A. Braun |
Unresolved |
22 |
| Isoetes indica Pant & Srivastava |
Unresolved |
22 |
| Isoetes japonica A. Br. |
Unresolved |
33 |
| Isoetes jeffreyi D. M. Britton & D. F. Brunton |
Unresolved |
None |
| Isoetes junciformis D. F. Brunt. & D. M. Britton |
Unresolved |
22 |
| Isoetes kirkii A. Braun |
Unresolved |
11 |
| Isoetes muelleri A. Braun |
Unresolved |
11 |
| Isoetes olympica A. Braun |
Unresolved |
11 |
| Isoetes panchananii Pant & Srivast. |
Unresolved |
22 |
| Isoetes pantii H. K. Goswami & B. S. Arya |
Unresolved |
18 |
| Isoetes pseudojaponica M. Takamiya & M. Watan. & K. Ono |
Unresolved |
44 |
| Isoetes pseudotruncata Britton & D. F. Brunt. |
Unresolved |
None |
| Isoetes rajasthanensis Gena & Bhardwaja |
Unresolved |
22 |
| Isoetes reticulata Gena & Bhardwaja |
Unresolved |
22 |
| Isoetes subinermis Cesca |
Unresolved |
11 |
| Isoetes tennesseensis Luebke & Budke |
Unresolved |
44 |
| Isoetes tuberculata Gena & Bhardwaja |
Unresolved |
11 |
| Isoetes × altonharvillii Musselman & R. D. Bray |
Unresolved |
11 |
| Isoetes × hickeyi W. C. Taylor & Luebke |
Unresolved |
33 |
| Isoetes coromandeliana L. |
Synonym of Calamaria coromandelina (L.) Kuntze |
22 |
| Isoetes coromandeliana L. |
Synonym of Calamaria coromandelina (L.) Kuntze |
22 |
| Isoetes malinverniana Ces. & D. Not. |
Synonym of Calamaria malinverniana (Ces. & D. Not.) Kuntze |
22 |
| Isoetes histrix Bory & Durieu |
Synonym of Cephaloceraton histrix (Bory & Durieu) Gennari |
10 |
| Isoetes duriei Bory |
Synonym of Isoetella duriei (Bory) Gennari |
55 |
| Stylites gemmifera Rauh |
Synonym of Isoetes andicola (Amstutz) L. D. Gómez |
22 |
| Isoetes echinospora None |
Synonym of Isoetes echinospora Durieu |
11 |
| Isoetes echinospora subsp. muricata (Durieu) Á. Löve & D. Löve |
Synonym of Isoetes echinospora Durieu |
11 |
| Isoetes muricata Durieu |
Synonym of Isoetes echinospora Durieu |
11 |
| Isoetes valida (Engelm.) Clute |
Synonym of Isoetes engelmannii A. Braun |
11 |
| Isoetes lacustris None |
Synonym of Isoetes lacustris L. |
55 |
| Isoetes macrospora Durieu |
Synonym of Isoetes lacustris L. |
55 |
| Isoetes glacialis Aspl. |
Synonym of Isoetes lechleri Mett. |
22 |
| Isoetes michinokuana M. Takamiya & al. |
Synonym of Isoetes michinokuana M. Takamiya & M. Watan. & K. Ono |
None |
| Isoetes saccharata Engelm. |
Synonym of Isoetes riparia Engelm. ex A. Braun |
22 |
| Isoetes sampathkumarinii |
Synonym of Isoetes sampathkumarinii L. N. Rao |
33 |
| Isoetes sinensis |
Synonym of Isoetes sinensis Palmer |
22 |
| Isoetes tuckermanii |
Synonym of Isoetes tuckermanii A. Braun ex Engelm. |
22 |
| Isoetes longissima Bory & Dur. |
Synonym of Isoetes velata f. longissima (Bory & Dur.) N. Pfeiff. |
22 |
| Isoetes piedmontana (N. Pfeiff.) C. F. Reed |
Synonym of Isoetes virginica N. Pfeiff. |
22 |