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 |
|---|---|---|---|
| Ruppia maritima | L. | 75 | documented |
| Ruppia cirrhosa | (Petagna) Grande | 13 | documented |
| Ruppia tuberosa | J.S.Davis & Toml. | 7 | documented |
| Ruppia megacarpa | R.Mason | 3 | documented |
| Ruppia polycarpa | R.Mason | 2 | below the evidence gate |
| Ruppia bicarpa | Yu Ito & Muasya | 0 | below the evidence gate |
| Ruppia brevipedunculata | Shuo Yu & Hartog | 0 | below the evidence gate |
| Ruppia didyma | Sw. ex Wikstr. | 0 | below the evidence gate |
| Ruppia drepanensis | Tineo | 0 | below the evidence gate |
| Ruppia filifolia | (Phil.) Skottsb. | 0 | below the evidence gate |
| Ruppia sinensis | Shuo Yu & Hartog | 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.