Oxypolis rigidior var. ambigua (Nuttall) B.L. Robinson

Oxypolis rigidior var. ambigua (Nuttall) B.L. Robinson is a synonym sensu FNA Ed. Comm., in prep. f of:

Oxypolis rigidior (Linnaeus) Rafinesque, an accepted species name sensu FNA Ed. Comm., in prep. f.