| Rosaceae | |
Crataegus calpodendron var. calpodendron
| | | |
| Rosaceae | ** |
Crataegus calpodendron var. gigantea
| Kruschke | Milwaukee Public Mus. Publ. Bot. 3: 26–29, f. 8–10 | 1965 |
| Rosaceae | |
Crataegus calpodendron var. globosa
| (Sarg.) E.J. Palmer | Brittonia 5(5): 489 | 1946 |
| Rosaceae | |
Crataegus calpodendron var. hispidula
| (Sarg.) E.J. Palmer | Ann. Missouri Bot. Gard. 22(3): 564 | 1935 |
| Rosaceae | |
Crataegus calpodendron var. microcarpa
| (Chapm.) E.J. Palmer | Brittonia 5(5): 489 | 1946 |
| Rosaceae | |
Crataegus calpodendron var. mollicula
| (Sarg.) E.J. Palmer | Brittonia 5(5): 490 | 1946 |
| Rosaceae | |
Crataegus calpodendron var. obesa
| (Ashe) E.J. Palmer | Ann. Missouri Bot. Gard. 22(3): 564 | 1935 |
| Rosaceae | |
Crataegus calpodendron var. spinulosa
| Medic. | | |