PTPER FLORA OF THE STATE OF AVASHIXGTOX, 155 



Spikelets oylindric, the scales spirally arranged. 

 Style not enlarged at base. 



Annuals ; perianth bristles none Hemicarph.\ i p. 159) . 



Perennials ; perianth bristles present . 



Bristles short : barbed Scnjprs (p. 156 ) . 



Bristles long and silky, smooth Eriophorum (p. 15S ) . 



Style enlarged at base. 



Spikelets solitary on a scape El.eocharis ( p. 159 ) . 



Spikelets not solitary : stems leafy. Rhtxchospora < p. Ifil^ . 



CYPERUS. 

 Rachis not winged: annuals. 



Scales tipped with recurved awns 1. C. injlexus. 



Scales acuminate, not awned 2. C. acuminaiu^. 



Rachis winged. 



Wing of the rachis separating from it as scales: annual 3. C. erythrorhizos. 



Wing of the rachis persistent. 



Perennial with corm-like tubers i. C. strigosus. 



Perennial by rootstocks bearing nut-like tubers o. C. escul^ntus. 



1. Cyperus inflexus Muhl. Gram. 16. 1S17. 



Cypfrus arisiaiu-s Rottb. err. det. Boeckl. Linnaea 35: 500. 1S68 



Type localitt: Pennsylvania. 



Range: British Columbia to Vermont, south to Mexico and Florida. 



Specimens examined; West Klickitat County, SwIvsJor/'Sl: Kalama, Pup* r. October 31, 

 1901: Cascade Mountains, Ticeedy 38: Parker, Dunn, August 8, 1901: Lake Chelan, Elvur 

 in 1897: Yakima. Henderson, October, 1892: Spokane, Henderson, July. 1892: Almota. 

 Piper, September. 1896, August, 1894: Wawawai, Piper, August 24, 1894: without locality 

 Elmer 1069: Pullman, fi"/)er, July, 1894: without locality. LaJ:e d- Hull 369: Mission^ 

 Kreaper 493: Toppenish, CoHon 803: Prosser, Coffon 644. 



ZoxAL DISTRIBUTION": Upper Sonoran and Arid Transition. 



2. Cyperus acuminatus Torr. & Hook. Ann. Lye. X. Y. 3: 435. 1836. 

 Type locality: ■" Near St. Louis, Missouri." 



Range: Washington to Illinois, south to California and Texas. 

 Specimens ex.vmixed: .Vlmota. Pi}xr. August 26. 1894. 

 Zonal distribltiox : Upper Sonoran. 



3. Cyperus erythrorhizos Muhl. Gram. 20. 1817. 

 Cuperu-s occidenfalis Torr. Ann. Lye. N. Y. 3: 259. 1836. 

 Cyperus cupreu^ Presl. Rel. Haeuk. 1 : 172. 182S. 

 Type locality: Pennsylvania. 



Raxge: Washington to Massachusetts, south to Florida and California. 

 Speclmexs examined: West Klickitat County. Suksdorf '^l. 222, 587; Parker, Dunn, 

 August 8, 1901: Almota, Piper. 1937; Vancouver, Sheldon, 11274. 

 Zonal distribitiox: Upper Sonoran. 



4. Cyperus strigosus L. Sp. PI. 1: 47. 1753. 



T\"PE locality; "Habitat in paludibus Jamaicae, Virginiae." 



Range: Washington to Maine, south to Texas and Florida. 



Speclmexs examined: West Klickitat County, SulsdorfVXl, 84, September 15. 1SS6. 



This was listed by Suksdorf as " C. ii^compleius Link? " 



5. Cyperus esculentus L. Sp. PI. 1: 45. 1735, Xut grass. 

 Cyfteru.s phy:nah-Hlts Muhl. Gram. 23. 1817. 



Type locality: "Habitat Monspelii, inque Italia, Oriente." 



