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 |
|---|---|---|---|
| Psacalium peltatum | Cass. | 50 | documented |
| Psacalium sinuatum | (Cerv.) H.Rob. & Brettell | 31 | documented |
| Psacalium decompositum | (A.Gray) H.Rob. & Brettell | 26 | documented |
| Psacalium cirsiifolium | (Zucc.) H.Rob. & Brettell | 19 | documented |
| Psacalium silphiifolium | (B.L.Rob. & Greenm.) H.Rob. & Brettell | 17 | documented |
| Psacalium amplifolium | (DC.) H.Rob. & Brettell | 10 | documented |
| Psacalium platylepis | (B.L.Rob. & Seaton) H.Rob. & Brettell | 8 | documented |
| Psacalium mollifolium | S.F.Blake | 5 | documented |
| Psacalium paucicapitatum | (B.L.Rob. & Greenm.) H.Rob. & Brettell | 5 | documented |
| Psacalium eriocarpum | S.F.Blake | 4 | documented |
| Psacalium megaphyllum | Rydb. | 3 | documented |
| Psacalium radulifolium | (Kunth) H.Rob. & Brettell | 3 | documented |
| Psacalium laxiflorum | Benth. | 1 | below the evidence gate |
| Psacalium peltigerum | Rydb. | 1 | below the evidence gate |
| Psacalium amplum | (Rydb.) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium beamanii | H.Rob. | 0 | below the evidence gate |
| Psacalium brachycomum | (S.F.Blake) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium calvum | (Brandegee) Pippen | 0 | below the evidence gate |
| Psacalium cervinum | (Rydb.) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium cronquistiorum | B.L.Turner | 0 | below the evidence gate |
| Psacalium filicifolium | (Rydb.) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium glabratum | DC. | 0 | below the evidence gate |
| Psacalium globosum | (B.L.Rob. & Fernald) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium goldsmithii | (B.L.Rob.) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium guatemalense | (Standl. & Steyerm.) Cuatrec. | 0 | below the evidence gate |
| Psacalium guerreroanum | B.L.Turner | 0 | below the evidence gate |
| Psacalium hintonii | (Pippen) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium hintoniorum | B.L.Turner | 0 | below the evidence gate |
| Psacalium holwayanum | Rydb. | 0 | below the evidence gate |
| Psacalium latilobum | (Pippen) B.L.Turner | 0 | below the evidence gate |
| Psacalium matudae | H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium multilobum | (Pippen) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium nanum | Pippen | 0 | below the evidence gate |
| Psacalium napellifolium | (S.Schauer) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium nelsonii | Rydb. | 0 | below the evidence gate |
| Psacalium nephrophyllum | (Rydb.) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium obtusilobum | Rydb. | 0 | below the evidence gate |
| Psacalium pachyphyllum | (Sch.Bip.) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium palmeri | (Greene) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium pentaflorum | B.L.Turner | 0 | below the evidence gate |
| Psacalium perezii | B.L.Turner | 0 | below the evidence gate |
| Psacalium pinetorum | (Standl. & Steyerm.) Cuatrec. | 0 | below the evidence gate |
| Psacalium poculiferum | Rydb. | 0 | below the evidence gate |
| Psacalium pringlei | (S.Watson) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium purpusii | (Greenm.) H.Rob. & Brettell | 0 | below the evidence gate |
| Psacalium schillingii | Panero & Villaseñor | 0 | below the evidence gate |
| Psacalium sharpii | B.L.Turner | 0 | below the evidence gate |
| Psacalium tabulare | (A.Gray) Rydb. | 0 | below the evidence gate |
| Psacalium tussilaginoides | (Kunth) H.Rob. & Brettell | 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.