Convolvulus spithamaeus subsp. stans (Michaux) Wherry

Convolvulus spithamaeus subsp. stans (Michaux) Wherry is a synonym sensu FNA Ed. Comm., 2023c of:

Calystegia spithamaea subsp. stans (Michaux) Brummitt, an accepted subspecies name sensu FNA Ed. Comm., 2023c.