| Thaspium actaeifolium Nutt. |
Unresolved |
 |
WCSP (in review) |
|
| Thaspium atropurpureum (Lam.) Nutt. |
Synonym |
 |
TRO |
|
| Thaspium aureum (L.) Nutt. |
Synonym |
 |
TRO |
|
| Thaspium aureum var. atropurpureum (Nutt.) J.M. Coult. & Rose |
Unresolved |
 |
TRO |
|
| Thaspium barbinode (Michx.) Nutt. |
Accepted |
 |
TRO |
|
| Thaspium barbinode var. barbinode |
Synonym |
 |
TRO |
|
| Thaspium barbinode var. chapmanii J.M. Coult. & Rose |
Synonym |
 |
TRO |
|
| Thaspium chapmanii (J.M. Coult. & Rose) Small |
Accepted |
 |
TRO |
|
| Thaspium cordatum (Walter) Torr. & A. Gray |
Accepted |
 |
TRO |
|
| Thaspium foliosum Royle |
Unresolved |
 |
WCSP (in review) |
|
| Thaspium macrocarpum S.Watson |
Unresolved |
 |
WCSP (in review) |
|
| Thaspium montanum A. Gray |
Synonym |
 |
TRO |
|
| Thaspium montanum var. tenuifolium A. Gray |
Synonym |
 |
TRO |
|
| Thaspium pinnatifidum (Buckley) A. Gray |
Accepted |
 |
TRO |
|
| Thaspium purpureum Walp. |
Unresolved |
 |
WCSP (in review) |
|
| Thaspium sylvaticum (Benke) G.N.Jones |
Unresolved |
 |
WCSP (in review) |
|
| Thaspium trachypleurum A. Gray |
Synonym |
 |
TRO |
|
| Thaspium trifoliatum (L.) A. Gray |
Accepted |
 |
TRO |
|
| Thaspium trifoliatum var. apterum A. Gray |
Synonym |
 |
TRO |
|
| Thaspium trifoliatum var. atropurpureum (Nutt.) A. Gray |
Synonym |
 |
TRO |
|
| Thaspium trifoliatum var. aureum (Nutt.) Britton |
Accepted |
 |
TRO |
|
| Thaspium trifoliatum var. trifoliatum |
Synonym |
 |
TRO |
|
| Thaspium verticillatum Geyer ex Hook. |
Unresolved |
 |
WCSP (in review) |
|
| Thaspium walteri Shuttlew. ex A.Gray |
Unresolved |
 |
WCSP (in review) |
|
| Thaspium ziziopsis Daniels |
Unresolved |
 |
WCSP (in review) |
|