Clematis occidentalis subsp. grosseserrata (Rydberg) Roy L. Taylor & McBryde

Clematis occidentalis subsp. grosseserrata (Rydberg) Roy L. Taylor & McBryde is a synonym sensu FNA Ed. Comm., 1997 of:

Clematis occidentalis var. grosseserrata (Rydberg) J.S. Pringle, an accepted variety name sensu FNA Ed. Comm., 1997.