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 |
|---|---|---|---|
| Rubia peregrina | L. | 416 | documented |
| Rubia petiolaris | DC. | 90 | documented |
| Rubia fruticosa | Aiton | 68 | documented |
| Rubia cordifolia | L. | 50 | documented |
| Rubia tinctorum | L. | 50 | documented |
| Rubia argyi | (H.Lév. & Vaniot) H.Hara | 27 | documented |
| Rubia occidens | Capelo, M.Seq. & H.Schaef. | 27 | documented |
| Rubia alata | Wall. | 17 | documented |
| Rubia balearica | (Willk.) Porta | 16 | documented |
| Rubia horrida | (Thunb.) Puff | 14 | documented |
| Rubia chinensis | Regel & Maack | 12 | documented |
| Rubia tenuifolia | d'Urv. | 12 | documented |
| Rubia manjith | Roxb. | 8 | documented |
| Rubia linii | J.M.Chao | 6 | documented |
| Rubia tatarica | (Trevir.) F.Schmidt | 5 | documented |
| Rubia agostinhoi | Dans. & P.Silva | 0 | below the evidence gate |
| Rubia aitchisonii | Deb & Malick | 0 | below the evidence gate |
| Rubia alaica | Pachom. | 0 | below the evidence gate |
| Rubia albicaulis | Boiss. | 0 | below the evidence gate |
| Rubia angustisissima | Wall. ex G.Don | 0 | below the evidence gate |
| Rubia atropurpurea | Decne. | 0 | below the evidence gate |
| Rubia austrozhejiangensis | Z.P.Lei, Y.Y.Zhou & R.W.Wang | 0 | below the evidence gate |
| Rubia caramanica | Bornm. | 0 | below the evidence gate |
| Rubia charifolia | Wall. ex G.Don | 0 | below the evidence gate |
| Rubia chitralensis | Ehrend. | 0 | below the evidence gate |
| Rubia clematidifolia | Blume ex Decne. | 0 | below the evidence gate |
| Rubia crassipes | Collett & Hemsl. | 0 | below the evidence gate |
| Rubia cretacea | Pojark. | 0 | below the evidence gate |
| Rubia danaensis | Danin | 0 | below the evidence gate |
| Rubia davisiana | Ehrend. | 0 | below the evidence gate |
| Rubia deserticola | Pojark. | 0 | below the evidence gate |
| Rubia discolor | Turcz. | 0 | below the evidence gate |
| Rubia dolichophylla | Schrenk | 0 | below the evidence gate |
| Rubia edgeworthii | Hook.f. | 0 | below the evidence gate |
| Rubia falciformis | H.S.Lo | 0 | below the evidence gate |
| Rubia filiformis | F.C.How ex H.S.Lo | 0 | below the evidence gate |
| Rubia florida | Boiss. ex Hohen. | 0 | below the evidence gate |
| Rubia garrettii | Craib | 0 | below the evidence gate |
| Rubia gedrosiaca | Bornm. | 0 | below the evidence gate |
| Rubia haematantha | Airy Shaw | 0 | below the evidence gate |
| Rubia hangii | L.E Yang & Z.L.Nie | 0 | below the evidence gate |
| Rubia hexaphylla | (Makino) Makino | 0 | below the evidence gate |
| Rubia himalayensis | Klotzsch | 0 | below the evidence gate |
| Rubia hispidicaulis | D.G.Long | 0 | below the evidence gate |
| Rubia infundibularis | Hemsl. & Lace | 0 | below the evidence gate |
| Rubia jesoensis | (Miq.) Miyabe & Kudô | 0 | below the evidence gate |
| Rubia komarovii | Pojark. | 0 | below the evidence gate |
| Rubia krascheninnikovii | Pojark. | 0 | below the evidence gate |
| Rubia laevissima | Tschern. | 0 | below the evidence gate |
| Rubia latipetala | H.S.Lo | 0 | below the evidence gate |
| Rubia laurae | (Holmboe) Airy Shaw | 0 | below the evidence gate |
| Rubia laxiflora | Gontsch. | 0 | below the evidence gate |
| Rubia magna | P.K.Hsiao | 0 | below the evidence gate |
| Rubia mandersii | Collett & Hemsl. | 0 | below the evidence gate |
| Rubia maymanensis | Ehrend. & Schönb.-Tem. | 0 | below the evidence gate |
| Rubia membranacea | Diels | 0 | below the evidence gate |
| Rubia oncotricha | Hand.-Mazz. | 0 | below the evidence gate |
| Rubia oppositifolia | Griff. | 0 | below the evidence gate |
| Rubia ovatifolia | Z.Ying Zhang | 0 | below the evidence gate |
| Rubia pallida | Diels | 0 | below the evidence gate |
| Rubia pauciflora | Boiss. | 0 | below the evidence gate |
| Rubia pavlovii | Bajtenov & Myrz. | 0 | below the evidence gate |
| Rubia philippinensis | Elmer | 0 | below the evidence gate |
| Rubia pianmaensis | R.Li & H.Li | 0 | below the evidence gate |
| Rubia podantha | Diels | 0 | below the evidence gate |
| Rubia polyphlebia | H.S.Lo | 0 | below the evidence gate |
| Rubia pseudogalium | Ehrend. | 0 | below the evidence gate |
| Rubia pterygocaulis | H.S.Lo | 0 | below the evidence gate |
| Rubia rechingeri | Ehrend. | 0 | below the evidence gate |
| Rubia regelii | Pojark. | 0 | below the evidence gate |
| Rubia rezniczenkoana | Litv. | 0 | below the evidence gate |
| Rubia rigidifolia | Pojark. | 0 | below the evidence gate |
| Rubia rotundifolia | Banks & Sol. | 0 | below the evidence gate |
| Rubia salicifolia | H.S.Lo | 0 | below the evidence gate |
| Rubia schugnanica | B.Fedtsch. ex Pojark. | 0 | below the evidence gate |
| Rubia schumanniana | E.Pritz. | 0 | below the evidence gate |
| Rubia siamensis | Craib | 0 | below the evidence gate |
| Rubia sikkimensis | Kurz | 0 | below the evidence gate |
| Rubia sylvatica | (Maxim.) Nakai | 0 | below the evidence gate |
| Rubia tenuissima | M.H.J.van der Meer | 0 | below the evidence gate |
| Rubia thunbergii | DC. | 0 | below the evidence gate |
| Rubia tibetica | Hook.f. | 0 | below the evidence gate |
| Rubia transcaucasica | Grossh. | 0 | below the evidence gate |
| Rubia trichocarpa | H.S.Lo | 0 | below the evidence gate |
| Rubia truppeliana | Loes. | 0 | below the evidence gate |
| Rubia urceolata | X.F.Wang & C.H.Wang | 0 | below the evidence gate |
| Rubia wallichiana | Decne. | 0 | below the evidence gate |
| Rubia yunnanensis | Diels | 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.