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 |
|---|---|---|---|
| Acanthus mollis | L. | 964 | documented |
| Acanthus ilicifolius | L. | 103 | documented |
| Acanthus spinosus | L. | 42 | documented |
| Acanthus polystachyus | Delile | 35 | documented |
| Acanthus hirsutus | Boiss. | 9 | documented |
| Acanthus ebracteatus | Vahl | 8 | documented |
| Acanthus sennii | Chiov. | 8 | documented |
| Acanthus caroli-alexandri | Hausskn. | 6 | documented |
| Acanthus guineensis | Heine & P.Taylor | 4 | documented |
| Acanthus hungaricus | (Borbás) Baen. | 3 | documented |
| Acanthus eminens | C.B.Clarke | 2 | below the evidence gate |
| Acanthus leucostachyus | Wall. ex Nees | 1 | below the evidence gate |
| Acanthus albus | Debnath, B.K.Singh & P.Giri | 0 | below the evidence gate |
| Acanthus arboreus | Forssk. | 0 | below the evidence gate |
| Acanthus austromontanus | Vollesen | 0 | below the evidence gate |
| Acanthus carduaceus | Griff. | 0 | below the evidence gate |
| Acanthus caudatus | Lindau | 0 | below the evidence gate |
| Acanthus dioscoridis | L. | 0 | below the evidence gate |
| Acanthus flexicaulis | Bremek. | 0 | below the evidence gate |
| Acanthus gaed | Lindau | 0 | below the evidence gate |
| Acanthus greuterianus | Snogerup, B.Snogerup & Strid | 0 | below the evidence gate |
| Acanthus kulalensis | Vollesen | 0 | below the evidence gate |
| Acanthus latisepalus | C.B.Clarke | 0 | below the evidence gate |
| Acanthus longibracteatus | Kurz | 0 | below the evidence gate |
| Acanthus mayaccanus | Büttner | 0 | below the evidence gate |
| Acanthus montanus | (Nees) T.Anderson | 0 | below the evidence gate |
| Acanthus seretii | De Wild. | 0 | below the evidence gate |
| Acanthus ueleensis | De Wild. | 0 | below the evidence gate |
| Acanthus villaeanus | De Wild. | 0 | below the evidence gate |
| Acanthus volubilis | Wall. | 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.