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 |
|---|---|---|---|
| Otopappus guatemalensis | (Urb.) R.L.Hartm. & Stuessy | 6 | documented |
| Otopappus acuminatus | S.Watson | 4 | documented |
| Otopappus epaleaceus | Hemsl. | 2 | below the evidence gate |
| Otopappus scaber | S.F.Blake | 2 | below the evidence gate |
| Otopappus tequilanus | (A.Gray) B.L.Rob. | 2 | below the evidence gate |
| Otopappus brevipes | B.L.Rob. | 1 | below the evidence gate |
| Otopappus calarcanus | S.Díaz | 0 | below the evidence gate |
| Otopappus curviflorus | (R.Br.) Hemsl. | 0 | below the evidence gate |
| Otopappus glabratus | (J.M.Coult.) S.F.Blake | 0 | below the evidence gate |
| Otopappus hirsutus | (Sw.) R.L.Hartm. & Stuessy | 0 | below the evidence gate |
| Otopappus imbricatus | S.F.Blake | 0 | below the evidence gate |
| Otopappus koelzii | McVaugh | 0 | below the evidence gate |
| Otopappus mexicanus | (Rzed.) H.Rob. | 0 | below the evidence gate |
| Otopappus microcephalus | S.F.Blake | 0 | below the evidence gate |
| Otopappus robustus | Hemsl. | 0 | below the evidence gate |
| Otopappus syncephalus | Donn.Sm. | 0 | below the evidence gate |
| Otopappus verbesinoides | Benth. | 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.