Every accepted species in the genus is listed. A name links to its page when we hold at least three commercially licensed photographs of it. Where we do not, the row shows how many we actually found, which is usually none.
| Species | Authority | Usable photographs | Page |
|---|---|---|---|
| Isoetes nuttallii | A.Braun ex Engelm. | 42 | documented |
| Isoetes butleri | Engelm. | 34 | documented |
| Isoetes howellii | Engelm. | 34 | documented |
| Isoetes echinospora | Durieu | 33 | documented |
| Isoetes lithophila | N.Pfeiff. | 27 | documented |
| Isoetes orcuttii | A.A.Eaton | 14 | documented |
| Isoetes bolanderi | Engelm. | 11 | documented |
| Isoetes alpina | Kirk | 10 | documented |
| Isoetes laurentiana | D.F.Brunt. | 10 | documented |
| Isoetes louisianensis | Thieret | 9 | documented |
| Isoetes septentrionalis | D.F.Brunt. | 9 | documented |
| Isoetes minima | A.A.Eaton | 8 | documented |
| Isoetes hyemalis | D.F.Brunt. | 7 | documented |
| Isoetes lacustris | L. | 7 | documented |
| Isoetes melanopoda | J.Gay & Durieu | 7 | documented |
| Isoetes andicola | (Amstutz) L.D.Gómez | 6 | documented |
| Isoetes occidentalis | L.F.Hend. | 6 | documented |
| Isoetes viridimontana | M.A.Rosenthal & W.C.Taylor | 6 | documented |
| Isoetes jarmaniae | D.F.Brunt., Kantvilas & M.Garrett | 5 | documented |
| Isoetes valida | Clute | 4 | documented |
| Isoetes virginica | N.Pfeiff. | 3 | documented |
| Isoetes andina | Spruce ex Hook. | 2 | below the evidence gate |
| Isoetes histrix | Bory | 2 | below the evidence gate |
| Isoetes japonica | A.Braun | 2 | below the evidence gate |
| Isoetes longissima | Bory | 2 | below the evidence gate |
| Isoetes appalachiana | D.F.Brunt. & D.M.Britton | 1 | below the evidence gate |
| Isoetes engelmannii | A.Braun | 1 | below the evidence gate |
| Isoetes melanospora | Engelm. | 1 | below the evidence gate |
| Isoetes mississippiensis | S.W.Leonard, W.C.Taylor, Musselman & R.D.Bray | 1 | below the evidence gate |
| Isoetes novogranadensis | H.P.Fuchs | 1 | below the evidence gate |
| Isoetes storkii | T.C.Palmer | 1 | below the evidence gate |
| Isoetes tegetiformans | Rury | 1 | below the evidence gate |
| Isoetes × altonharvillii | Musselman & R.D.Bray | 0 | below the evidence gate |
| Isoetes × angeloi | D.F.Brunt. & K.L.McIntosh | 0 | below the evidence gate |
| Isoetes × blondeaui | D.F.Brunt. & P.C.Sokoloff | 0 | below the evidence gate |
| Isoetes × brittonii | D.F.Brunt. & W.C.Taylor | 0 | below the evidence gate |
| Isoetes × brochonii | Motelay | 0 | below the evidence gate |
| Isoetes × bruntonii | Knepper & Musselman | 0 | below the evidence gate |
| Isoetes × eatonii | R.Dodge | 0 | below the evidence gate |
| Isoetes × echtuckeri | D.F.Brunt. & D.M.Britton | 0 | below the evidence gate |
| Isoetes × fernaldii | D.F.Brunt. & P.C.Sokoloff | 0 | below the evidence gate |
| Isoetes × gopalkrishnae | S.K.Singh, P.K.Shukla & N.K.Dubey | 0 | below the evidence gate |
| Isoetes × harveyi | A.A.Eaton | 0 | below the evidence gate |
| Isoetes × herb-wagneri | W.C.Taylor | 0 | below the evidence gate |
| Isoetes × hickeyi | W.C.Taylor & Luebke | 0 | below the evidence gate |
| Isoetes × jeffreyi | D.M.Britton & D.F.Brunt. | 0 | below the evidence gate |
| Isoetes × jermyi | D.F.Brunt. & Rumsey | 0 | below the evidence gate |
| Isoetes × kareniae | D.F.Brunt. & P.C.Sokoloff | 0 | below the evidence gate |
| Isoetes × marensis | D.M.Britton & D.F.Brunt. | 0 | below the evidence gate |
| Isoetes × michinokuana | M.Takamiya, Mits.Watan. & K.Ono | 0 | below the evidence gate |
| Isoetes × novae-angliae | D.F.Brunt. & D.M.Britton | 0 | below the evidence gate |
| Isoetes × paratunica | D.F.Brunt., Mochalova & A.A.Bobrov | 0 | below the evidence gate |
| Isoetes × pseudotruncata | Britton & D.F.Brunt. | 0 | below the evidence gate |
| Isoetes × robusta | (Engelm.) D.F.Brunt. | 0 | below the evidence gate |
| Isoetes abyssinica | Chiov. | 0 | below the evidence gate |
| Isoetes aemulans | J.P.Roux | 0 | below the evidence gate |
| Isoetes aequinoctialis | Welw. ex A.Br. | 0 | below the evidence gate |
| Isoetes afloramientorum | D.F.Brunt. & J.B.S.Pereira | 0 | below the evidence gate |
| Isoetes alcalophila | S.Halloy | 0 | below the evidence gate |
| Isoetes alstonii | C.F.Reed & Verdc. | 0 | below the evidence gate |
| Isoetes amazonica | A.Braun | 0 | below the evidence gate |
| Isoetes anamariae | J.B.S.Pereira | 0 | below the evidence gate |
| Isoetes anatolica | Prada & Rolleri | 0 | below the evidence gate |
| Isoetes araucaniana | Macluf & Hickey | 0 | below the evidence gate |
| Isoetes asiatica | (Makino) Makino | 0 | below the evidence gate |
| Isoetes attenuata | C.R.Marsden & Chinnock | 0 | below the evidence gate |
| Isoetes australis | S.Williams | 0 | below the evidence gate |
| Isoetes azorica | Durieu | 0 | below the evidence gate |
| Isoetes baculata | Hickey & H.P.Fuchs | 0 | below the evidence gate |
| Isoetes baodongii | Y.F.Gu, Y.H.Yan & Yi Jun Lu | 0 | below the evidence gate |
| Isoetes biafrana | Alston | 0 | below the evidence gate |
| Isoetes bilaspurensis | Panigrahi | 0 | below the evidence gate |
| Isoetes bischlerae | H.P.Fuchs | 0 | below the evidence gate |
| Isoetes boliviensis | U.Weber | 0 | below the evidence gate |
| Isoetes boomii | Luebke | 0 | below the evidence gate |
| Isoetes boryana | Durieu | 0 | below the evidence gate |
| Isoetes boyacensis | H.P.Fuchs | 0 | below the evidence gate |
| Isoetes bradei | Herter | 0 | below the evidence gate |
| Isoetes brasiliensis | H.P.Fuchs | 0 | below the evidence gate |
| Isoetes brevicula | E.R.L.Johnson | 0 | below the evidence gate |
| Isoetes candelariensis | C.C.Macluf & G.J.Marquez | 0 | below the evidence gate |
| Isoetes cangae | J.B.S.Pereira, Salino & Stützel | 0 | below the evidence gate |
| Isoetes caparaoensis | J.B.S.Pereira | 0 | below the evidence gate |
| Isoetes capensis | A.V.Duthie | 0 | below the evidence gate |
| Isoetes carltaylori | Musselman | 0 | below the evidence gate |
| Isoetes caroli | E.R.L.Johnson | 0 | below the evidence gate |
| Isoetes caroliniana | (A.A.Eaton) Luebke | 0 | below the evidence gate |
| Isoetes changleensis | Yu C.Chen & Xing Liu | 0 | below the evidence gate |
| Isoetes changxingensis | Y.F.Gu & J.H.Shen | 0 | below the evidence gate |
| Isoetes chubutiana | Hickey, Macluf & W.C.Taylor | 0 | below the evidence gate |
| Isoetes cipoensis | J.B.S.Pereira | 0 | below the evidence gate |
| Isoetes coreana | Y.H.Chung & H.K.Choi | 0 | below the evidence gate |
| Isoetes coromandelina | L.f. | 0 | below the evidence gate |
| Isoetes creussensis | Lazare & S.Riba | 0 | below the evidence gate |
| Isoetes cristata | C.R.Marsden & Chinnock | 0 | below the evidence gate |
| Isoetes cubana | Engelm. | 0 | below the evidence gate |
| Isoetes delalandei | J.Lloyd | 0 | below the evidence gate |
| Isoetes delilei | (Bory) Rothm. | 0 | below the evidence gate |
| Isoetes dispora | Hickey | 0 | below the evidence gate |
| Isoetes dixitii | Shende | 0 | below the evidence gate |
| Isoetes dodgei | A.A.Eaton | 0 | below the evidence gate |
| Isoetes dodgei | B. & B. | 0 | below the evidence gate |
| Isoetes drummondii | A.Braun | 0 | below the evidence gate |
| Isoetes dubsii | J.B.S.Pereira | 0 | below the evidence gate |
| Isoetes duriei | Bory | 0 | below the evidence gate |
| Isoetes ecuadoriensis | Aspl. | 0 | below the evidence gate |
| Isoetes ekmanii | U.Weber | 0 | below the evidence gate |
| Isoetes elatior | A.Braun | 0 | below the evidence gate |
| Isoetes eludens | J.P.Roux, Hopper & Rhian J.Sm. | 0 | below the evidence gate |
| Isoetes escondidensis | S.Halloy | 0 | below the evidence gate |
| Isoetes eshbaughii | Hickey | 0 | below the evidence gate |
| Isoetes fengii | Y.F.Gu & Y.H.Yan | 0 | below the evidence gate |
| Isoetes flaccida | Shuttlew. ex A.Braun | 0 | below the evidence gate |
| Isoetes fluitans | M.I.Romero | 0 | below the evidence gate |
| Isoetes foveolata | A.A.Eaton | 0 | below the evidence gate |
| Isoetes fuliginosa | R.L.Small & Hickey | 0 | below the evidence gate |
| Isoetes fuscomarginata | H.P.Fuchs | 0 | below the evidence gate |
| Isoetes gardneriana | Kunze | 0 | below the evidence gate |
| Isoetes georgiana | Luebke | 0 | below the evidence gate |
| Isoetes giessii | Launert | 0 | below the evidence gate |
| Isoetes gigantea | U.Weber | 0 | below the evidence gate |
| Isoetes graniticola | D.F.Brunt. | 0 | below the evidence gate |
| Isoetes gunnii | A.Braun | 0 | below the evidence gate |
| Isoetes gymnocarpa | (Gennari) A.Braun | 0 | below the evidence gate |
| Isoetes habbemensis | Alston | 0 | below the evidence gate |
| Isoetes hallasanensis | H.K.Choi, Ch.Kim & J.Jung | 0 | below the evidence gate |
| Isoetes hallei | Eb.Fisch. & Lobin | 0 | below the evidence gate |
| Isoetes harleyi | J.B.S.Pereira | 0 | below the evidence gate |
| Isoetes haussknechtii | Troìa & Greuter | 0 | below the evidence gate |
| Isoetes hawaiiensis | W.C.Taylor & W.H.Wagner | 0 | below the evidence gate |
| Isoetes heldreichii | Wettst. | 0 | below the evidence gate |
| Isoetes hemivelata | R.L.Small & Hickey | 0 | below the evidence gate |
| Isoetes herzogii | U.Weber | 0 | below the evidence gate |
| Isoetes heterospora | A.A.Eaton | 0 | below the evidence gate |
| Isoetes hewitsonii | Hickey | 0 | below the evidence gate |
| Isoetes hieronymi | U.Weber | 0 | below the evidence gate |
| Isoetes hopei | J.R.Croft | 0 | below the evidence gate |
| Isoetes humilior | A.Braun | 0 | below the evidence gate |
| Isoetes hypsophila | Hand.-Mazz. | 0 | below the evidence gate |
| Isoetes inflata | E.R.L.Johnson | 0 | below the evidence gate |
| Isoetes jaegeri | Pitot | 0 | below the evidence gate |
| Isoetes jamaicensis | Hickey | 0 | below the evidence gate |
| Isoetes jejuensis | H.K.Choi, Ch.Kim & J.Jung | 0 | below the evidence gate |
| Isoetes junciformis | D.F.Brunt. & D.M.Britton | 0 | below the evidence gate |
| Isoetes karstenii | A.Braun | 0 | below the evidence gate |
| Isoetes kashyapii | M.Patel, M.N.Reddy & H.K.Goswami | 0 | below the evidence gate |
| Isoetes killipii | C.V.Morton | 0 | below the evidence gate |
| Isoetes kirkii | A.Br. | 0 | below the evidence gate |
| Isoetes labri-draconis | N.R.Crouch | 0 | below the evidence gate |
| Isoetes laosiensis | C.Kim & H.K.Choi | 0 | below the evidence gate |
| Isoetes lechleri | Mett. | 0 | below the evidence gate |
| Isoetes libanotica | Musselman, Bolin & R.D.Bray | 0 | below the evidence gate |
| Isoetes longifolia | J.B.S.Pereira | 0 | below the evidence gate |
| Isoetes longpingii | Y.H.Yan, Y.F.Gu & J.P.Shu | 0 | below the evidence gate |
| Isoetes luetzelburgii | U.Weber | 0 | below the evidence gate |
| Isoetes malinverniana | Ces. & De Not. | 0 | below the evidence gate |
| Isoetes maritima | Underw. | 0 | below the evidence gate |
| Isoetes martii | A.Braun | 0 | below the evidence gate |
| Isoetes mattaponica | Musselman & W.C.Taylor | 0 | below the evidence gate |
| Isoetes maxima | Hickey, Macluf & Link-Pérez | 0 | below the evidence gate |
| Isoetes melanotheca | Alston | 0 | below the evidence gate |
| Isoetes mexicana | Underw. | 0 | below the evidence gate |
| Isoetes microvela | D.F.Brunt. | 0 | below the evidence gate |
| Isoetes mongerensis | E.R.L.Johnson | 0 | below the evidence gate |
| Isoetes montezumae | A.A.Eaton | 0 | below the evidence gate |
| Isoetes mourabaptistae | J.B.S.Pereira, P.G.Windisch, Lorscheitt. & Labiak | 0 | below the evidence gate |
| Isoetes muelleri | A.Braun | 0 | below the evidence gate |
| Isoetes naipiana | P.G.Windisch, Lorscheitt. & Nervo | 0 | below the evidence gate |
| Isoetes nana | J.B.S.Pereira | 0 | below the evidence gate |
| Isoetes neoguineensis | Baker | 0 | below the evidence gate |
| Isoetes nigritiana | A.Br. | 0 | below the evidence gate |
| Isoetes nigroreticulata | Verdc. | 0 | below the evidence gate |
| Isoetes olympica | A.Br. | 0 | below the evidence gate |
| Isoetes organensis | U.Weber | 0 | below the evidence gate |
| Isoetes orientalis | Hong Liu & Q.F.Wang | 0 | below the evidence gate |
| Isoetes ovata | N.Pfeiff. | 0 | below the evidence gate |
| Isoetes pallida | Hickey | 0 | below the evidence gate |
| Isoetes palmeri | H.P.Fuchs | 0 | below the evidence gate |
| Isoetes panamensis | Maxon & C.V.Morton | 0 | below the evidence gate |
| Isoetes parvula | Hickey | 0 | below the evidence gate |
| Isoetes pedersenii | H.P.Fuchs ex E.I.Meza & Macluf | 0 | below the evidence gate |
| Isoetes perrieriana | Iversen | 0 | below the evidence gate |
| Isoetes philippinensis | Merr. & L.M.Perry | 0 | below the evidence gate |
| Isoetes phrygia | (Boiss.) Hausskn. | 0 | below the evidence gate |
| Isoetes pichisermollii | Eb.Fisch. & Lobin | 0 | below the evidence gate |
| Isoetes pirinica | D.F.Brunt. & D.Ivanova | 0 | below the evidence gate |
| Isoetes pitotii | Alston | 0 | below the evidence gate |
| Isoetes precocia | R.L.Small & Hickey | 0 | below the evidence gate |
| Isoetes pringlei | Underw. | 0 | below the evidence gate |
| Isoetes prototypus | D.M.Britton & Goltz | 0 | below the evidence gate |
| Isoetes pseudojaponica | M.Takamiya, Mits.Watan. & K.Ono | 0 | below the evidence gate |
| Isoetes pusilla | C.R.Marsden & Chinnock | 0 | below the evidence gate |
| Isoetes quiririensis | J.B.S.Pereira & Labiak | 0 | below the evidence gate |
| Isoetes ramboi | Herter | 0 | below the evidence gate |
| Isoetes riparia | Engelm. ex A.Braun | 0 | below the evidence gate |
| Isoetes rwandensis | Eb.Fisch. & Lobin | 0 | below the evidence gate |
| Isoetes sabatina | Troìa & Azzella | 0 | below the evidence gate |
| Isoetes saccharata | Engelm. | 0 | below the evidence gate |
| Isoetes sahyadrii | Mahab. ex L.N.Rao | 0 | below the evidence gate |
| Isoetes salishensis | D.F.Brunt. | 0 | below the evidence gate |
| Isoetes santacruzensis | J.B.S.Pereira | 0 | below the evidence gate |
| Isoetes saracochensis | Hickey | 0 | below the evidence gate |
| Isoetes savatieri | Franch. | 0 | below the evidence gate |
| Isoetes schweinfurthii | A.Br. | 0 | below the evidence gate |
| Isoetes sehnemii | H.P.Fuchs | 0 | below the evidence gate |
| Isoetes serracarajensis | J.B.S.Pereira, Salino & Stützel | 0 | below the evidence gate |
| Isoetes shangrilaensis | Xiang Li, Yuqian Huang, X.Dai & Xing Liu | 0 | below the evidence gate |
| Isoetes sinensis | T.C.Palmer | 0 | below the evidence gate |
| Isoetes smithii | H.P.Fuchs | 0 | below the evidence gate |
| Isoetes spannagelii | H.P.Fuchs | 0 | below the evidence gate |
| Isoetes spinulospora | C.Jermy & Schelpe | 0 | below the evidence gate |
| Isoetes stellenbossiensis | A.V.Duthie | 0 | below the evidence gate |
| Isoetes stephanseniae | A.V.Duthie | 0 | below the evidence gate |
| Isoetes stevensii | J.R.Croft | 0 | below the evidence gate |
| Isoetes taiwanensis | De Vol | 0 | below the evidence gate |
| Isoetes tamaulipana | Mora-Olivo, A.Mend. & Mart.-Aval. | 0 | below the evidence gate |
| Isoetes tenella | Léman ex Desv. | 0 | below the evidence gate |
| Isoetes tennesseensis | Luebke & Budke | 0 | below the evidence gate |
| Isoetes tenuifolia | Jermy | 0 | below the evidence gate |
| Isoetes texana | Singhurst, Rushing & W.C.Holmes | 0 | below the evidence gate |
| Isoetes tiguliana | Gennari | 0 | below the evidence gate |
| Isoetes todaroana | Troìa & Raimondo | 0 | below the evidence gate |
| Isoetes toximontana | Musselman & J.P.Roux | 0 | below the evidence gate |
| Isoetes transvaalensis | C.Jermy & Schelpe | 0 | below the evidence gate |
| Isoetes triangula | U.Weber | 0 | below the evidence gate |
| Isoetes tripus | A.Braun | 0 | below the evidence gate |
| Isoetes truncata | (A.A.Eaton) Clute | 0 | below the evidence gate |
| Isoetes tuckermanii | A.Braun ex Engelm. | 0 | below the evidence gate |
| Isoetes tuerckheimii | Brause | 0 | below the evidence gate |
| Isoetes udupiensis | P.K.Shukla, G.K.Srivast., S.K.Shukla & P.K.Rajagopal | 0 | below the evidence gate |
| Isoetes ulei | U.Weber | 0 | below the evidence gate |
| Isoetes vanensis | M.Keskin & G.Zare | 0 | below the evidence gate |
| Isoetes vermiculata | Hickey | 0 | below the evidence gate |
| Isoetes weberi | Herter ex U.Weber | 0 | below the evidence gate |
| Isoetes welwitschii | A.Br. ex Kuhn | 0 | below the evidence gate |
| Isoetes wormaldii | Sim | 0 | below the evidence gate |
| Isoetes xiangfei | Y.H.Yan, Y.F.Gu & J.P.Shu | 0 | below the evidence gate |
| Isoetes yuhangensis | Yu C.Chen & Xing Liu | 0 | below the evidence gate |
| Isoetes yunguiensis | Q.F.Wang & W.C.Taylor | 0 | below the evidence gate |
This site is commercial, so it can only publish photographs licensed for commercial use. Roughly three quarters of the photographs on iNaturalist are CC BY-NC, which excludes them. A species needs at least three usable photographs before we will build it a page, because a page with one picture and no traits tells you nothing you could not get from a search result, and generating hundreds of thousands of those is precisely the practice that got the previous version of this site deleted.
So the species above without a link are not errors and they are not omissions. They are real, accepted plants that we cannot yet document to the standard we hold ourselves to, and the count in the photographs column is exactly how far short we fall.