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 |
|---|---|---|---|
| Ulmus americana | L. | 2,303 | documented |
| Ulmus crassifolia | Nutt. | 1,580 | documented |
| Ulmus pumila | L. | 1,146 | documented |
| Ulmus glabra | Huds. | 816 | documented |
| Ulmus alata | Michx. | 675 | documented |
| Ulmus minor | Mill. | 648 | documented |
| Ulmus laevis | Pall. | 550 | documented |
| Ulmus rubra | Muhl. | 448 | documented |
| Ulmus parvifolia | Jacq. | 305 | documented |
| Ulmus thomasii | Sarg. | 52 | documented |
| Ulmus laciniata | (Herder) Mayr ex Schwapp. | 37 | documented |
| Ulmus mexicana | (Liebm.) Planch. | 23 | documented |
| Ulmus uyematsui | Hayata | 19 | documented |
| Ulmus ismaelis | Todzia & Panero | 10 | documented |
| Ulmus davidiana | Planch. | 4 | documented |
| Ulmus serotina | Sarg. | 4 | documented |
| Ulmus macrocarpa | Hance | 1 | below the evidence gate |
| Ulmus wallichiana | Planch. | 1 | below the evidence gate |
| Ulmus × androssowii | Litv. | 0 | below the evidence gate |
| Ulmus × brandisiana | C.K.Schneid. | 0 | below the evidence gate |
| Ulmus × hollandica | Mill. | 0 | below the evidence gate |
| Ulmus × intermedia | Elowsky | 0 | below the evidence gate |
| Ulmus × mesocarpa | M.Kim & S.Lee | 0 | below the evidence gate |
| Ulmus bergmanniana | C.K.Schneid. | 0 | below the evidence gate |
| Ulmus boissieri | Grudz. | 0 | below the evidence gate |
| Ulmus castaneifolia | Hemsl. | 0 | below the evidence gate |
| Ulmus changii | W.C.Cheng | 0 | below the evidence gate |
| Ulmus chenmoui | W.C.Cheng | 0 | below the evidence gate |
| Ulmus chumlia | Melville & Heybroek | 0 | below the evidence gate |
| Ulmus elliptica | K.Koch | 0 | below the evidence gate |
| Ulmus elongata | L.K.Fu & C.S.Ding | 0 | below the evidence gate |
| Ulmus gaussenii | Cheng | 0 | below the evidence gate |
| Ulmus glaucescens | Franch. | 0 | below the evidence gate |
| Ulmus harbinensis | S.Q.Nie & G.Q.Huang | 0 | below the evidence gate |
| Ulmus kunmingensis | W.C.Cheng | 0 | below the evidence gate |
| Ulmus lamellosa | Z.Wang & S.L.Chang | 0 | below the evidence gate |
| Ulmus lanceifolia | Roxb. | 0 | below the evidence gate |
| Ulmus lesueurii | Standl. | 0 | below the evidence gate |
| Ulmus mianzhuensis | T.P.Yi & Lin Yang | 0 | below the evidence gate |
| Ulmus microcarpa | L.K.Fu | 0 | below the evidence gate |
| Ulmus prunifolia | W.C.Cheng & L.K.Fu | 0 | below the evidence gate |
| Ulmus pseudopropinqua | Z.Wang & Li | 0 | below the evidence gate |
| Ulmus szechuanica | Fang | 0 | below the evidence gate |
| Ulmus villosa | Brandis ex Gamble | 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.