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 |
|---|---|---|---|
| Knowltonia tenuifolia | (L.f.) Mosyakin | 255 | documented |
| Knowltonia vesicatoria | Sims | 234 | documented |
| Knowltonia filia | T.Durand & Schinz | 43 | documented |
| Knowltonia fanninii | (Harv. & Hook.f.) Christenh. & Byng | 35 | documented |
| Knowltonia anemonoides | H.Rasmussen | 33 | documented |
| Knowltonia mexicana | (Kunth) Christenh. & Byng | 23 | documented |
| Knowltonia hootae | Christenh. & Byng | 13 | documented |
| Knowltonia capensis | Huth | 12 | documented |
| Knowltonia integrifolia | (DC.) Christenh. & Byng | 12 | documented |
| Knowltonia cordata | H.Rasmussen | 10 | documented |
| Knowltonia crassifolia | (Hook.) Christenh. & Byng | 6 | documented |
| Knowltonia afra | (Eckl. & Zeyh.) Christenh. & Byng ex Mosyakin & de Lange | 3 | documented |
| Knowltonia major | (Phil.) Christenh. & Byng | 3 | documented |
| Knowltonia transvaalensis | Szyszył. | 4 | below the evidence gate |
| Knowltonia balliana | (Britton) Christenh. & Byng | 2 | below the evidence gate |
| Knowltonia chilensis | (Gay) Christenh. & Byng | 2 | below the evidence gate |
| Knowltonia helleborifolia | (DC.) Christenh. & Byng | 1 | below the evidence gate |
| Knowltonia hepaticifolia | (Hook.) Christenh. & Byng | 1 | below the evidence gate |
| Knowltonia assisbrasiliana | (Kuhlm. & Porto) Christenh. & Byng | 0 | below the evidence gate |
| Knowltonia bracteata | Harv. ex Zahlbr. | 0 | below the evidence gate |
| Knowltonia brevistylis | Szyszył. | 0 | below the evidence gate |
| Knowltonia moorei | (Espinosa) Christenh. & Byng | 0 | below the evidence gate |
| Knowltonia peruviana | (Britton) Christenh. & Byng | 0 | below the evidence gate |
| Knowltonia sellowii | (Pritz.) Christenh. & Byng | 0 | below the evidence gate |
| Knowltonia whyteana | (Baker f.) Engl. | 0 | below the evidence gate |
| Knowltonia whytei | Engl. | 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.