Rumex stenophyllus Ledeb.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - A related European halophyte rarely adventive with us, will key here. It differs in its often less strongly crisped lvs and especially in the numerous small but distinct teeth along the margins of the valves.