Lophotocarpus spongiosus (Engelmann) J.G. Smith

Lophotocarpus spongiosus (Engelmann) J.G. Smith is a synonym sensu FNA Ed. Comm., 2000 of:

Sagittaria montevidensis subsp. spongiosa (Engelmann) Bogin, an accepted subspecies name sensu FNA Ed. Comm., 2000.