Pteridium aquilinum subsp. lanuginosum (Bongard) Hultén
Pteridium aquilinum subsp. lanuginosum (Bongard) Hultén is a synonym sensu USDA NRCS, 2009+ of:
Pteridium aquilinum subsp. pubescens (Underw.) J.A. Thomson, Mickel & Mehltreter, an accepted subspecies name sensu Hassler & Schmidt, 2014+.