| Asteraceae | |
Cirsium acaule var. americanum
| A. Gray | Proc. Acad. Nat. Sci. Philadelphia 15(3): 68–69 | 1863 [1864] |
| Asteraceae | |
Cirsium acaule var. caulescens
| Tamamsch. | | * |
| Asteraceae | |
Cirsium acaule subsp. esculentum
| Werner | Bot. J. Linn. Soc. 70(1): 19 | 1975 |
| Asteraceae | |
Cirsium acaule var. gmelinii
| (C.A. Mey.) C.A. Mey. | | * |
| Asteraceae | |
Cirsium acaule var. rhizocephalum
| Tamamsch. | | * |
| Asteraceae | |
Cirsium acaule var. subacaule
| Tamamsch. | | * |