Pteridium aquilinum var. latiusculum

Pteridium aquilinum var. latiusculum (Desvaux) Underwood ex A. Heller is a synonym (FNA Ed. Comm., 1993) of:

Pteridium aquilinum subsp. latiusculum (Desvaux) Hultén ex R.T. Clausen , an accepted subspecies name sensu IPNI.