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 |
|---|---|---|---|
| Hydnocarpus pentandrus | (Buch.-Ham.) Oken | 29 | documented |
| Hydnocarpus alpinus | Wight | 20 | documented |
| Hydnocarpus alcalae | C.DC. | 0 | below the evidence gate |
| Hydnocarpus annamensis | Lescot & Sleumer ex Harwood & B.L.Webber | 0 | below the evidence gate |
| Hydnocarpus annamica | H.L.Li | 0 | below the evidence gate |
| Hydnocarpus anomalus | (Merr.) Sleumer | 0 | below the evidence gate |
| Hydnocarpus beccarianus | Sleumer | 0 | below the evidence gate |
| Hydnocarpus borneensis | Sleumer | 0 | below the evidence gate |
| Hydnocarpus calophyllus | (Ridl.) Sleumer | 0 | below the evidence gate |
| Hydnocarpus calvipetalus | Craib | 0 | below the evidence gate |
| Hydnocarpus castanea | Hook.f. & Thomson | 0 | below the evidence gate |
| Hydnocarpus castaneus | Hook.f. & Thomson | 0 | below the evidence gate |
| Hydnocarpus cauliflora | Merr. | 0 | below the evidence gate |
| Hydnocarpus corymbosa | Seem. | 0 | below the evidence gate |
| Hydnocarpus corymbosus | (Choisy ex DC.) Seem. | 0 | below the evidence gate |
| Hydnocarpus crassifolius | Sleumer | 0 | below the evidence gate |
| Hydnocarpus cucurbitina | King | 0 | below the evidence gate |
| Hydnocarpus cucurbitinus | King | 0 | below the evidence gate |
| Hydnocarpus curtisii | King | 0 | below the evidence gate |
| Hydnocarpus dawnensis | C.E.Parkinson & C.E.C.Fisch. | 0 | below the evidence gate |
| Hydnocarpus elmeri | Merr. | 0 | below the evidence gate |
| Hydnocarpus filipes | Symington & Sleumer | 0 | below the evidence gate |
| Hydnocarpus glaucescens | Blume | 0 | below the evidence gate |
| Hydnocarpus gracilis | (Slooten) Sleumer | 0 | below the evidence gate |
| Hydnocarpus hainanensis | (Merr.) Sleumer | 0 | below the evidence gate |
| Hydnocarpus heteroclitus | Spreng. | 0 | below the evidence gate |
| Hydnocarpus heterophyllus | Blume | 0 | below the evidence gate |
| Hydnocarpus humei | Ridl. | 0 | below the evidence gate |
| Hydnocarpus ilicifolia | King | 0 | below the evidence gate |
| Hydnocarpus ilicifolius | King | 0 | below the evidence gate |
| Hydnocarpus kunstleri | (King) Warb. | 0 | below the evidence gate |
| Hydnocarpus kurzii | (King) Warb. | 0 | below the evidence gate |
| Hydnocarpus lanceolatus | Spreng. | 0 | below the evidence gate |
| Hydnocarpus longipedunculatus | Robi, Sasidh. & Jose | 0 | below the evidence gate |
| Hydnocarpus macrocarpa | (Bedd.) Warb. | 0 | below the evidence gate |
| Hydnocarpus macrocarpus | (Bedd.) Warb. | 0 | below the evidence gate |
| Hydnocarpus merrillianus | Sleumer | 0 | below the evidence gate |
| Hydnocarpus nana | King | 0 | below the evidence gate |
| Hydnocarpus nanus | King | 0 | below the evidence gate |
| Hydnocarpus octandra | Thwaites | 0 | below the evidence gate |
| Hydnocarpus octandrus | Thwaites | 0 | below the evidence gate |
| Hydnocarpus pendulus | Manilal, T.Sabu & Sivar. | 0 | below the evidence gate |
| Hydnocarpus pinguis | Sleumer | 0 | below the evidence gate |
| Hydnocarpus polypetalus | (Slooten) Sleumer | 0 | below the evidence gate |
| Hydnocarpus saigonensis | Pierre ex Gagnep. | 0 | below the evidence gate |
| Hydnocarpus scortechinii | King | 0 | below the evidence gate |
| Hydnocarpus subfalcata | Merr. | 0 | below the evidence gate |
| Hydnocarpus sumatranus | (Miq.) Koord. | 0 | below the evidence gate |
| Hydnocarpus tenuipetalus | Sleumer | 0 | below the evidence gate |
| Hydnocarpus venenata | Gaertn. | 0 | below the evidence gate |
| Hydnocarpus venenatus | Gaertn. | 0 | below the evidence gate |
| Hydnocarpus verrucosus | C.E.Parkinson & C.E.C.Fisch. | 0 | below the evidence gate |
| Hydnocarpus woodii | Merr. | 0 | below the evidence gate |
| Hydnocarpus wrayi | King | 0 | below the evidence gate |
| Hydnocarpus yatesii | Merr. | 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.