Publication: Linnaea. 36: 290. 1870.
selected vouchers: WTU
Notes: A weed around the world; possibly not native to W. WA.
FNA23: "Cyperus esculentus var. leptostachyus is the most common of the varieties nearly throughout the range of the species in North America.
Cyperus esculentus is a widespread and polymorphic species. Although seven varieties have been recognized (G. Kükenthal (1935–1936), recent studies based primarily on spikelet features provided support for four varieties (P. Schippers et al. 1995). Cyperus esculentus var. esculentus is restricted to the Old World."