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 |
|---|---|---|---|
| Callitriche stagnalis | Scop. | 254 | documented |
| Callitriche palustris | L. | 168 | documented |
| Callitriche muelleri | Sond. | 37 | documented |
| Callitriche heterophylla | Pursh | 24 | documented |
| Callitriche terrestris | Raf. | 22 | documented |
| Callitriche cophocarpa | Sendtn. | 18 | documented |
| Callitriche chathamensis | (R.Mason) Lansdown | 16 | documented |
| Callitriche truncata | Guss. | 15 | documented |
| Callitriche petriei | R.Mason | 13 | documented |
| Callitriche brutia | Petagna | 10 | documented |
| Callitriche hermaphroditica | L. | 9 | documented |
| Callitriche obtusangula | Le Gall | 4 | documented |
| Callitriche platycarpa | Kütz. | 3 | documented |
| Callitriche antarctica | Engelm. ex Hegelm. | 1 | below the evidence gate |
| Callitriche deflexa | A.Braun ex Hegelm. | 1 | below the evidence gate |
| Callitriche hamulata | Kütz. ex W.D.J.Koch | 1 | below the evidence gate |
| Callitriche pedunculosa | Nutt. | 1 | below the evidence gate |
| Callitriche peploides | Nutt. | 1 | below the evidence gate |
| Callitriche × vigens | K.Martinsson | 0 | below the evidence gate |
| Callitriche alata | A.I.Baranov & Skvortsov | 0 | below the evidence gate |
| Callitriche albomarginata | Fassett | 0 | below the evidence gate |
| Callitriche anisoptera | Schotsman | 0 | below the evidence gate |
| Callitriche aucklandica | R.Mason | 0 | below the evidence gate |
| Callitriche berteroana | (Hegelm.) Lansdown & Hassemer | 0 | below the evidence gate |
| Callitriche brachycarpa | Hegelm. | 0 | below the evidence gate |
| Callitriche brevistyla | Lansdown | 0 | below the evidence gate |
| Callitriche capricorni | R.Mason | 0 | below the evidence gate |
| Callitriche christensenii | Christoph. | 0 | below the evidence gate |
| Callitriche ciliata | Lansdown & Hassemer | 0 | below the evidence gate |
| Callitriche compressa | N.E.Br. | 0 | below the evidence gate |
| Callitriche concinna | Lansdown & Hassemer | 0 | below the evidence gate |
| Callitriche cribrosa | Schotsman | 0 | below the evidence gate |
| Callitriche cyclocarpa | Hegelm. | 0 | below the evidence gate |
| Callitriche cycloptera | Schotsman | 0 | below the evidence gate |
| Callitriche dacryoidea | Lansdown & Hassemer | 0 | below the evidence gate |
| Callitriche ecarinata | Lansdown & Hassemer | 0 | below the evidence gate |
| Callitriche fassettii | Schotsman | 0 | below the evidence gate |
| Callitriche favargera | Schotsman | 0 | below the evidence gate |
| Callitriche favargeri | Schotsman | 0 | below the evidence gate |
| Callitriche fehmedianii | Majeed Kak & Javeid | 0 | below the evidence gate |
| Callitriche fuliginea | Lansdown | 0 | below the evidence gate |
| Callitriche fuscicarpa | Lansdown | 0 | below the evidence gate |
| Callitriche glareosa | Lansdown | 0 | below the evidence gate |
| Callitriche hedbergiorum | Schotsman | 0 | below the evidence gate |
| Callitriche hegelmaieriana | Lansdown & Hassemer | 0 | below the evidence gate |
| Callitriche heteropoda | Engelm. ex Hegelm. | 0 | below the evidence gate |
| Callitriche hybrida | E.H.L.Krause | 0 | below the evidence gate |
| Callitriche insularis | Lansdown | 0 | below the evidence gate |
| Callitriche japonica | Engelm. ex Hegelm. | 0 | below the evidence gate |
| Callitriche keniensis | Schotsman | 0 | below the evidence gate |
| Callitriche lechleri | (Hegelm.) Fassett | 0 | below the evidence gate |
| Callitriche lenisulca | Clavaud | 0 | below the evidence gate |
| Callitriche longipedunculata | Morong | 0 | below the evidence gate |
| Callitriche lusitanica | Schotsman | 0 | below the evidence gate |
| Callitriche mandonis | Van Heurck & Müll.Arg. | 0 | below the evidence gate |
| Callitriche marginata | Torr. | 0 | below the evidence gate |
| Callitriche mathezii | Schotsman | 0 | below the evidence gate |
| Callitriche mouterdei | Schotsman | 0 | below the evidence gate |
| Callitriche nubigena | Fassett | 0 | below the evidence gate |
| Callitriche nyrensis | Prančl | 0 | below the evidence gate |
| Callitriche oblongicarpa | Fassett | 0 | below the evidence gate |
| Callitriche occidentalis | Hegelm. | 0 | below the evidence gate |
| Callitriche oreophila | Schotsman | 0 | below the evidence gate |
| Callitriche papuana | Merr. & L.M.Perry | 0 | below the evidence gate |
| Callitriche praetermissa | Lansdown & Hassemer | 0 | below the evidence gate |
| Callitriche pulchra | Schotsman | 0 | below the evidence gate |
| Callitriche quindiensis | Fassett | 0 | below the evidence gate |
| Callitriche raveniana | Lansdown | 0 | below the evidence gate |
| Callitriche regis-jubae | Schotsman | 0 | below the evidence gate |
| Callitriche rimosa | Fassett | 0 | below the evidence gate |
| Callitriche schotsmaniana | Lansdown & Hassemer | 0 | below the evidence gate |
| Callitriche sonderi | Hegelm. | 0 | below the evidence gate |
| Callitriche stenoptera | Lansdown | 0 | below the evidence gate |
| Callitriche transvolgensis | Tzvelev | 0 | below the evidence gate |
| Callitriche trochlearis | Fassett | 0 | below the evidence gate |
| Callitriche turfosa | Bertero ex Hegelm. | 0 | below the evidence gate |
| Callitriche umbonata | Hegelm. | 0 | below the evidence gate |
| Callitriche vulcanicola | Schotsman | 0 | below the evidence gate |
| Callitriche wightiana | Wall. ex Wight & Arn. | 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.