THE IOWA SEDGES 319 



3. C. inflexus MuhL Gram., 16 (1817). 



C. aristatns Boeckl. Linmea, xxxv, 500 in part (1S68), not Rottb., Desc. 

 & Icon., 23 (1773). 

 Illus. Flora, 1, 273, fig. 549; Gray's Man., 6th ed., 507; Arthur, Cont. Fl. 

 Iowa, 11; Hitchcock, PI. Ames, 523: MacMillan, Metas. Minn. Val., 

 93; Tracy, Fl. Missouri, 91; Brendel. Fl. Peoriana, 61; Hale, Add. Fl. 

 Wis., 5; R_ydberg.Fl. Sand Hills, Neb., 184; Rydberg, Fl. Black Hills, 

 S. D., 526; Fink. Iowa Acad. Sci., iv, 105. 



Sandy margins of streams and ponds; throughout. The 

 long, tapering, recurved points of the scales readily distin- 

 guish this from any of our other species. 



Story county, 1886, and Iowa City. 18S7, Hitchcock; Em- 

 met county, 1884, and Dickinson county, 1896, Cratty ; Ham- 

 ilton county, 1891, Rolfs ; Fayette county, 1894, Fink; Clin- 

 ton county, 1896, Pummel; Johnson county, 1894, Fitzpatrick; 

 Nora Springs, July, 1889, and Clear Lake, 1889, Johnson; 

 Scott and Muscatine counties, Barnes & Miller ; Ames, Sept., 

 1897, No. 444, C. C. Ball. 



4. C. schweinitzii Torr. Ann. Lye. N. Y., in, 276 (1836). 



Illus. Flora, 1, 23S, fig. 551; Gray's Man., 6th ed.. 597: Arthur, Fl. Iowa, 33; 

 Hitchcock, PI. Ames, 523; MacMillan, Metas. Minn. Val., 92: Tracy, 

 Fl. Missouri, 91; Brendel, Fl. Peoriana, 88; Bruhin, Fl. Wis., 27S; 

 Rydberg, Fl. Sand Hills, Neb.. 183; Williams, Grass and Forage PI. 

 Daks., 41; Fink. Iowa Acad. Sci., iv, 105. 



Sandy margins of streams and lakes; quite variable. Com- 

 mon, at least through the northern half of the state. 



Charles City. July, 1872, Arthur ; Marshalltown, 1891, 

 Stewart; Ames, 1889, Hitchcock; Newton, 1891. Dreiv; 

 Cedar Rapids, 1891, Pummel; Emmet county, 18S2, and 

 Spirit Lake. 1896, Cratty ; Fremont county, 1888, Hitchcock ; 

 Fayette county, 1894, Fink; Johnson county, Fitzpatrick : 

 Lynville, Jasper county, July, 1888, jYorris ; Scott and Musca- 

 tine counties, Barnes & Miller. 



5. C. acuminatus Torr. & Hook, in Torr. Cyp. 435 (1836). 



Illus. Flora, 1, 239, fig. 553; Gray's Man., 6th ed., 570; Arthur, Cont. Fl. 

 Iowa, iv ; Tracy, Fl. Mo., 90; Brendel, Fl. Peoriana, 61: Bruhin, Zwei. 

 Nach. Fl. Wis., 643; Webber, App. Fl. Neb., 24; Rydberg. Fl. Black 

 Hills, S. D., 526. 



