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 |
|---|---|---|---|
| Riccia fluitans | L. | 197 | documented |
| Riccia sorocarpa | Bisch. | 146 | documented |
| Riccia cavernosa | Hoffm. | 128 | documented |
| Riccia crinita | Taylor | 67 | documented |
| Riccia beyrichiana | Hampe ex Lehm. | 43 | documented |
| Riccia lamellosa | Raddi | 31 | documented |
| Riccia nigrella | DC. | 27 | documented |
| Riccia frostii | Austin | 26 | documented |
| Riccia crystallina | L. | 20 | documented |
| Riccia ciliifera | Link ex Lindenb. | 19 | documented |
| Riccia asprella | Carrington & Pearson | 16 | documented |
| Riccia subbifurca | Warnst. ex Croz. | 16 | documented |
| Riccia crozalsii | Levier | 15 | documented |
| Riccia glauca | L. | 14 | documented |
| Riccia campbelliana | M.Howe | 11 | documented |
| Riccia albovestita | O.H.Volk | 8 | documented |
| Riccia papillosa | Moris | 8 | documented |
| Riccia spongiosula | Na-Thalang | 8 | documented |
| Riccia boumanii | Dirkse, Losada-Lima & M.Stech | 7 | documented |
| Riccia gougetiana | Durieu & Mont. | 5 | documented |
| Riccia inflexa | Taylor | 5 | documented |
| Riccia crassa | Steph. | 4 | documented |
| Riccia stricta | (Lindenb.) Perold | 4 | documented |
| Riccia ciliata | Hoffm. | 3 | documented |
| Riccia huebeneriana | Lindenb. | 3 | documented |
| Riccia rhenana | Lorb. ex Müll.Frib. | 3 | documented |
| Riccia canaliculata | Hoffm. | 2 | below the evidence gate |
| Riccia cartilaginosa | Steph. | 2 | below the evidence gate |
| Riccia trabutiana | Steph. | 2 | below the evidence gate |
| Riccia villosa | Steph. | 2 | below the evidence gate |
| Riccia bifurca | Hoffm. | 1 | below the evidence gate |
| Riccia rorida | Na-Thalang | 1 | below the evidence gate |
| Riccia abdita | Cargill | 0 | below the evidence gate |
| Riccia abuensis | Bapna | 0 | below the evidence gate |
| Riccia acutisulca | Steph. | 0 | below the evidence gate |
| Riccia alatospora | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia albida | Sull. ex Austin | 0 | below the evidence gate |
| Riccia albolimbata | S.W.Arnell | 0 | below the evidence gate |
| Riccia albomarginata | Bisch. | 0 | below the evidence gate |
| Riccia alboporosa | Perold | 0 | below the evidence gate |
| Riccia albopunctata | Jovet-Ast | 0 | below the evidence gate |
| Riccia albornata | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia amboinensis | Schiffn. | 0 | below the evidence gate |
| Riccia ampullacea | Perold | 0 | below the evidence gate |
| Riccia anatolica | Özenoğlu & Kırmacı | 0 | below the evidence gate |
| Riccia angolensis | Steph. | 0 | below the evidence gate |
| Riccia anguillarum | Cargill | 0 | below the evidence gate |
| Riccia arachnoidea | O.F.Müll. | 0 | below the evidence gate |
| Riccia aravalliensis | Pandé & Udar | 0 | below the evidence gate |
| Riccia argenteolimbata | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia arnellii | Sultan Khan | 0 | below the evidence gate |
| Riccia asservanda | De Not. ex Lamothe | 0 | below the evidence gate |
| Riccia atlantica | Sérgio & Perold | 0 | below the evidence gate |
| Riccia atromarginata | Levier | 0 | below the evidence gate |
| Riccia atropurpurea | Sim | 0 | below the evidence gate |
| Riccia attenuata | Pandé | 0 | below the evidence gate |
| Riccia auriformis | With. | 0 | below the evidence gate |
| Riccia australis | Steph. | 0 | below the evidence gate |
| Riccia bahiensis | Steph. | 0 | below the evidence gate |
| Riccia balansae | Steph. | 0 | below the evidence gate |
| Riccia bialbistrata | Hässel | 0 | below the evidence gate |
| Riccia bicarinata | Lindb. | 0 | below the evidence gate |
| Riccia bicolorata | Perold | 0 | below the evidence gate |
| Riccia billardierei | Mont. & Nees | 0 | below the evidence gate |
| Riccia biokoensis | Perold | 0 | below the evidence gate |
| Riccia blackii | Na-Thalang | 0 | below the evidence gate |
| Riccia boliviensis | Jovet-Ast | 0 | below the evidence gate |
| Riccia brasiliensis | Schiffn. | 0 | below the evidence gate |
| Riccia breidleri | Jur. ex Steph. | 0 | below the evidence gate |
| Riccia breutelii | Hampe ex Steph. | 0 | below the evidence gate |
| Riccia brittonii | M.Howe | 0 | below the evidence gate |
| Riccia bullosa | Link | 0 | below the evidence gate |
| Riccia californica | Austin | 0 | below the evidence gate |
| Riccia cancellata | Taylor | 0 | below the evidence gate |
| Riccia caroliniana | Na-Thalang | 0 | below the evidence gate |
| Riccia chartacea | K.I.Goebel | 0 | below the evidence gate |
| Riccia chiapasensis | Jovet-Ast | 0 | below the evidence gate |
| Riccia chinensis | Herzog | 0 | below the evidence gate |
| Riccia chrysocrinita | Cargill | 0 | below the evidence gate |
| Riccia chudoana | Steph. | 0 | below the evidence gate |
| Riccia cincta | Jovet-Ast | 0 | below the evidence gate |
| Riccia collata | Na-Thalang | 0 | below the evidence gate |
| Riccia compacta | Garside | 0 | below the evidence gate |
| Riccia concava | Bisch. | 0 | below the evidence gate |
| Riccia congoana | Steph. | 0 | below the evidence gate |
| Riccia convexa | Steph. | 0 | below the evidence gate |
| Riccia coracina | Jovet-Ast | 0 | below the evidence gate |
| Riccia coronata | Sim | 0 | below the evidence gate |
| Riccia corrugata | Jovet-Ast | 0 | below the evidence gate |
| Riccia crassifrons | Spruce | 0 | below the evidence gate |
| Riccia crassivenia | Jovet-Ast | 0 | below the evidence gate |
| Riccia crenatodentata | O.H.Volk | 0 | below the evidence gate |
| Riccia cruciata | Kashyap | 0 | below the evidence gate |
| Riccia crustata | Trab. | 0 | below the evidence gate |
| Riccia cubensis | S.W.Arnell | 0 | below the evidence gate |
| Riccia cupulifera | A.V.Duthie | 0 | below the evidence gate |
| Riccia curtisii | (Austin) Austin | 0 | below the evidence gate |
| Riccia delavayi | Steph. | 0 | below the evidence gate |
| Riccia deserticola | Steph. | 0 | below the evidence gate |
| Riccia dictyospora | M.Howe | 0 | below the evidence gate |
| Riccia discolor | Lehm. & Lindenb. | 0 | below the evidence gate |
| Riccia duplex | Lorb. ex Müll.Frib. | 0 | below the evidence gate |
| Riccia dussiana | Steph. | 0 | below the evidence gate |
| Riccia eburnea | Jovet-Ast | 0 | below the evidence gate |
| Riccia ekmanii | S.W.Arnell | 0 | below the evidence gate |
| Riccia elliottii | Steph. | 0 | below the evidence gate |
| Riccia elongata | Perold | 0 | below the evidence gate |
| Riccia enyae | Jovet-Ast | 0 | below the evidence gate |
| Riccia epecenia | Cargill | 0 | below the evidence gate |
| Riccia erubescens | Perold | 0 | below the evidence gate |
| Riccia erythrocarpa | Jovet-Ast | 0 | below the evidence gate |
| Riccia esulcata | Steph. | 0 | below the evidence gate |
| Riccia fertilissima | Steph. | 0 | below the evidence gate |
| Riccia fruchartii | Steph. | 0 | below the evidence gate |
| Riccia furfuracea | Perold | 0 | below the evidence gate |
| Riccia gangetica | Ahmad ex L.Söderstr., A.Hagborg & von Konrat | 0 | below the evidence gate |
| Riccia garsidei | Sim | 0 | below the evidence gate |
| Riccia geissleriana | Jovet-Ast | 0 | below the evidence gate |
| Riccia gemmifera | O.H.Volk | 0 | below the evidence gate |
| Riccia grandis | Nees | 0 | below the evidence gate |
| Riccia grollei | Udar | 0 | below the evidence gate |
| Riccia handelii | Schiffn. | 0 | below the evidence gate |
| Riccia hantamensis | Perold | 0 | below the evidence gate |
| Riccia hasskarliana | Steph. | 0 | below the evidence gate |
| Riccia hawaiiensis | Hürl. | 0 | below the evidence gate |
| Riccia hegewaldiana | Jovet-Ast | 0 | below the evidence gate |
| Riccia helenae | Jovet-Ast | 0 | below the evidence gate |
| Riccia hirsuta | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia hirta | (Austin) Underw. | 0 | below the evidence gate |
| Riccia horrida | Jovet-Ast | 0 | below the evidence gate |
| Riccia hortorum | Bory ex Lindenb. | 0 | below the evidence gate |
| Riccia howellii | M.Howe | 0 | below the evidence gate |
| Riccia ianthina | Jovet-Ast | 0 | below the evidence gate |
| Riccia indica | Udar & A.Gupta | 0 | below the evidence gate |
| Riccia indira-gandhiana | Dabhade & A.Hasan | 0 | below the evidence gate |
| Riccia intermedia | Roum. | 0 | below the evidence gate |
| Riccia iodocheila | M.Howe | 0 | below the evidence gate |
| Riccia jodhpurensis | Bapna | 0 | below the evidence gate |
| Riccia jovet-astiae | E.Vianna | 0 | below the evidence gate |
| Riccia junghuhniana | Nees & Lindenb. | 0 | below the evidence gate |
| Riccia keralensis | Manju, Chandini, Sushil K.Singh & K.P.Rajesh | 0 | below the evidence gate |
| Riccia kirinensis | C.Gao & K.C.Chang | 0 | below the evidence gate |
| Riccia lanceolata | Steph. | 0 | below the evidence gate |
| Riccia laxisquamata | (Steph.) Steph. | 0 | below the evidence gate |
| Riccia leptothallus | R.M.Schust. | 0 | below the evidence gate |
| Riccia liaoningensis | C.Gao & K.C.Chang | 0 | below the evidence gate |
| Riccia ligula | Steph. | 0 | below the evidence gate |
| Riccia limbata | Bisch. | 0 | below the evidence gate |
| Riccia limicola | Jovet-Ast | 0 | below the evidence gate |
| Riccia lindmanii | Steph. | 0 | below the evidence gate |
| Riccia linearis | (Schiffn.) Steph. | 0 | below the evidence gate |
| Riccia luticola | Na-Thalang | 0 | below the evidence gate |
| Riccia macallisteri | M.Howe | 0 | below the evidence gate |
| Riccia macrocarpa | Levier | 0 | below the evidence gate |
| Riccia macrospora | Steph. | 0 | below the evidence gate |
| Riccia mamillata | Trab. ex Steph. | 0 | below the evidence gate |
| Riccia mammifera | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia mamrensis | Perold | 0 | below the evidence gate |
| Riccia mangalorica | Ahmad ex Jovet-Ast | 0 | below the evidence gate |
| Riccia mauryana | Steph. | 0 | below the evidence gate |
| Riccia melanospora | Kashyap | 0 | below the evidence gate |
| Riccia membranacea | Gottsche & Lindenb. | 0 | below the evidence gate |
| Riccia michelii | Raddi | 0 | below the evidence gate |
| Riccia microciliata | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia miyakeana | Schiffn. | 0 | below the evidence gate |
| Riccia moenkemeyeri | Steph. | 0 | below the evidence gate |
| Riccia montana | Perold | 0 | below the evidence gate |
| Riccia multifida | (Steph.) F.M.Bailey | 0 | below the evidence gate |
| Riccia muscicola | Steph. | 0 | below the evidence gate |
| Riccia namaquensis | Perold | 0 | below the evidence gate |
| Riccia natalensis | Sim | 0 | below the evidence gate |
| Riccia nigerica | E.W.Jones | 0 | below the evidence gate |
| Riccia nigrescens | Mont. | 0 | below the evidence gate |
| Riccia nipponica | S.Hatt. | 0 | below the evidence gate |
| Riccia novohannoverana | Schiffn. | 0 | below the evidence gate |
| Riccia numeensis | Steph. | 0 | below the evidence gate |
| Riccia obchantiana | Cargill | 0 | below the evidence gate |
| Riccia obtusa | Meijer | 0 | below the evidence gate |
| Riccia oerstediana | Lindenb. & Hampe | 0 | below the evidence gate |
| Riccia okahandjana | S.W.Arnell | 0 | below the evidence gate |
| Riccia olgensis | Na-Thalang | 0 | below the evidence gate |
| Riccia oryzicola | T.Tominaga & Furuki | 0 | below the evidence gate |
| Riccia ozarkiana | McGregor | 0 | below the evidence gate |
| Riccia pandei | Udar | 0 | below the evidence gate |
| Riccia papillispora | Steph. | 0 | below the evidence gate |
| Riccia papulosa | (Steph.) Steph. | 0 | below the evidence gate |
| Riccia paraguayensis | Spruce | 0 | below the evidence gate |
| Riccia paranaensis | Hässel | 0 | below the evidence gate |
| Riccia parvoareolata | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia pathankotensis | Kashyap | 0 | below the evidence gate |
| Riccia perennis | Steph. | 0 | below the evidence gate |
| Riccia perssonii | Sultan Khan | 0 | below the evidence gate |
| Riccia perthiana | Steph. ex K.I.Goebel | 0 | below the evidence gate |
| Riccia planobiconvexa | Steph. | 0 | below the evidence gate |
| Riccia polycarpa | (Trab.) Jelenc | 0 | below the evidence gate |
| Riccia porosa | Taylor | 0 | below the evidence gate |
| Riccia pottsiana | Sim | 0 | below the evidence gate |
| Riccia prominens | Meijer | 0 | below the evidence gate |
| Riccia pseudofluitans | C.Gao & K.C.Chang | 0 | below the evidence gate |
| Riccia pubescens | S.Hatt. | 0 | below the evidence gate |
| Riccia pullulans | Jovet-Ast | 0 | below the evidence gate |
| Riccia pulveracea | Perold | 0 | below the evidence gate |
| Riccia purpurascens | Lehm. | 0 | below the evidence gate |
| Riccia pusilla | Warnst. | 0 | below the evidence gate |
| Riccia pyramidata | Willd. | 0 | below the evidence gate |
| Riccia radiata | Perold | 0 | below the evidence gate |
| Riccia radicosa | Pearson | 0 | below the evidence gate |
| Riccia rechingeri | Steph. | 0 | below the evidence gate |
| Riccia reticulata | Sw. | 0 | below the evidence gate |
| Riccia reticulatula | Udar | 0 | below the evidence gate |
| Riccia ridleyi | A.Gepp | 0 | below the evidence gate |
| Riccia rosea | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia rubricollis | Garside & A.V.Duthie ex Perold | 0 | below the evidence gate |
| Riccia runssorensis | Steph. | 0 | below the evidence gate |
| Riccia saharensis | Steph. ex Jovet-Ast | 0 | below the evidence gate |
| Riccia sahyadrica | Manju & Cargill | 0 | below the evidence gate |
| Riccia sanguineisporis | Jovet-Ast | 0 | below the evidence gate |
| Riccia sarieae | A.E.D.Daniels & D.T.T.Daniels | 0 | below the evidence gate |
| Riccia satoi | S.Hatt. | 0 | below the evidence gate |
| Riccia schelpei | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia schroederi | Steph. | 0 | below the evidence gate |
| Riccia schweinfurthii | Steph. | 0 | below the evidence gate |
| Riccia sibayenii | Perold | 0 | below the evidence gate |
| Riccia simii | Perold | 0 | below the evidence gate |
| Riccia singularis | Jovet-Ast | 0 | below the evidence gate |
| Riccia sinuata | Huds. | 0 | below the evidence gate |
| Riccia somaliensis | Perold | 0 | below the evidence gate |
| Riccia sommieri | Levier | 0 | below the evidence gate |
| Riccia squamata | Nees | 0 | below the evidence gate |
| Riccia subcrinita | You L.Xiang & R.L.Zhu | 0 | below the evidence gate |
| Riccia subdepilata | Jovet-Ast | 0 | below the evidence gate |
| Riccia subplana | Steph. | 0 | below the evidence gate |
| Riccia subtilis | (Steph.) Steph. | 0 | below the evidence gate |
| Riccia sumatrana | Meijer | 0 | below the evidence gate |
| Riccia symoensii | Vanden Berghen | 0 | below the evidence gate |
| Riccia taeniiformis | Jovet-Ast | 0 | below the evidence gate |
| Riccia tasmanica | Steph. ex Rodway | 0 | below the evidence gate |
| Riccia tenella | D.L.Jacobs | 0 | below the evidence gate |
| Riccia tomentosa | O.H.Volk & Perold | 0 | below the evidence gate |
| Riccia trachyglossa | Perold | 0 | below the evidence gate |
| Riccia treubiana | Steph. | 0 | below the evidence gate |
| Riccia triangularis | Steph. | 0 | below the evidence gate |
| Riccia tuberculata | Poir. | 0 | below the evidence gate |
| Riccia tuberosa | Taylor | 0 | below the evidence gate |
| Riccia udarii | Kanwal | 0 | below the evidence gate |
| Riccia velenovskyi | Kavina | 0 | below the evidence gate |
| Riccia velimalaiana | A.E.D.Daniels & P.Daniel | 0 | below the evidence gate |
| Riccia verrucosa | Cargill | 0 | below the evidence gate |
| Riccia viannae | Jovet-Ast | 0 | below the evidence gate |
| Riccia victoriensis | Steph. | 0 | below the evidence gate |
| Riccia violacea | M.Howe | 0 | below the evidence gate |
| Riccia vitalii | Jovet-Ast | 0 | below the evidence gate |
| Riccia vitrea | Perold | 0 | below the evidence gate |
| Riccia volkii | S.W.Arnell | 0 | below the evidence gate |
| Riccia vulcanicola | Eb.Fisch. | 0 | below the evidence gate |
| Riccia wainionis | Steph. | 0 | below the evidence gate |
| Riccia warnstorfii | Limpr. ex Warnst. | 0 | below the evidence gate |
| Riccia weymouthiana | Steph. ex Rodway | 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.