| Asteraceae | |
Achyropappus anthemoides
| Kunth | Nov. Gen. Sp. (folio ed.) 4: 203, pl. 390 | 1820 [1818] |
| Asteraceae | |
Achyropappus depauperatus
| (S.F. Blake) B.L. Turner | Phytologia 92(3): 345 | 2010 |
| Asteraceae | ** |
Achyropappus maritimus
| Poepp. ex DC. | Prodr. 5: 657 | 1836 |
| Asteraceae | |
Achyropappus neomexicanus
| (A. Gray) A. Gray ex Rydb. | Fl. Colorado 377 | 1906 |
| Asteraceae | |
Achyropappus pedatus
| (Cav.) Less. | Syn. Gen. Compos. 239 | 1832 |
| Asteraceae | |
Achyropappus queretarensis
| B.L. Turner | Phytoneuron 2012–83: 1–3, f, 1 | 2012 |
| Asteraceae | * |
Achyropappus schkuhrioides
| D. Don ex Hook. & Arn. | J. Bot. (Hooker) 3: 322 | 1841 |
| Asteraceae | |
Achyropappus schkuhrioides
| Link & Otto | Icon. Pl. Rar. [Link & Otto] 59, pl. 30 (plate dated 1830) | 1829 |
| Asteraceae | |
Achyropappus woodhousei
| A. Gray | Proc. Amer. Acad. Arts 6: 546 | 1865 |