Sphaerostigma bistortum (Nuttall ex Torrey & A. Gray) Walpers

Sphaerostigma bistortum (Nuttall ex Torrey & A. Gray) Walpers is a synonym sensu FNA Ed. Comm., 2021 of:

Camissoniopsis bistorta (Nuttall ex Torrey & A. Gray) W.L. Wagner & Hoch, an accepted species name sensu FNA Ed. Comm., 2021.