Schoenoplectus purshianus var. williamsii (Fernald) S.G. Smith

Schoenoplectus purshianus var. williamsii (Fernald) S.G. Smith is a synonym sensu FNA Ed. Comm., 2002a of:

Schoenoplectiella purshiana var. williamsii (Fernald) Hayasaka, an accepted variety name sensu Lye, 2003.