Eriophorum vaginatum var. spissum (Fernald) B. Boivin
Eriophorum vaginatum var. spissum (Fernald) B. Boivin is a synonym sensu FNA Ed. Comm., 2002a of:
Eriophorum vaginatum subsp. spissum (Fernald) Hultén, an accepted subspecies name sensu Cayouette (ined.).