Cirsium undulatum var. megacephalum (A. Gray) Fernald
Cirsium undulatum var. megacephalum (A. Gray) Fernald is a synonym sensu FNA Ed. Comm., 2006a of:
Cirsium undulatum (Nuttall) Sprengel, an accepted species name sensu FNA Ed. Comm., 2006a.
Cirsium undulatum var. megacephalum (A. Gray) Fernald is a synonym sensu FNA Ed. Comm., 2006a of:
Cirsium undulatum (Nuttall) Sprengel, an accepted species name sensu FNA Ed. Comm., 2006a.