Pistillate fls in short, bracted, panicled spikes terminating the branches; cal of 3 or 4 hyaline sep; ovary compressed, at maturity minutely 2-winged at the summit; styles 2, filiform; staminate fls several to many in a short terminal spike, or solitary or few at the top of the pistillate spikes; sep and stamens 3-5; seed flattened, obovate, closely invested by the very thin pericarp, the embryo horseshoe-shaped, the radicle basal; annual herbs with alternate, entire lvs. 7, Russia and Korea.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.