34 2 



NATURAL HISTORY BULLETIN. 



Not rare in low ground around sloughs; a beautiful species, 

 the purple scales being very conspicuous. It also is a native 

 of northern and central Europe. 



Emmet county, 1878, Cratty ; Ames, Hitchcock ; Charles 

 City, Arthur; Grinnell, May, 1886, Norris; Noels and Eld- 

 ridge, Scott county, 1895, Barnes & Miller; High Bridge, 

 Dallas county, July 6, 1897. a slender form 2 feet high, 

 Shimek; Story City, June 7, 1897, No. 421, Pammel & 

 Beyers. 



19. C. stricta Lam. Encyc. Meth., in, 387 (1789). 



Illus. Flora, i, 308, fig. 719; Gray's Man., 6th ed., 599; Arthur, Fl. Iowa, 34; 

 Hitchr.ock.Pl. Ames, 524; MacMillan, Metas. Minn. Val., 123; Tracy, 

 Fl. Mo., 95; Bessey, Cont. Fl. Iowa, 123; Brendel, Fl. Peoriana, 62; 

 Wheeler, Fl. Milwaukee Co., Wis., 187; Rydberg, Fl. Black Hills, S. D., 

 527; Fink, Iowa Acad. Sci., iv, 105. 



Sloughs and margins of ponds and streams throughout; 

 common and very variable. 



Fayette county, 1895, Fink ; Johnson county, 1893, and 

 Cedar Rapids, 1895, Shimek; Ames, Hitchcock; Emmet 

 county, Cratty ; Charles City, Arthur ; Iowa City, Hitchcock ; 

 Grinnell, 1886, Norris; Decatur county, May, 1897, prob- 

 ably this, the plant in flower only, Fitzpatrick; Spirit Lake, 

 June, 25, 1881, Arthur; Marshalltown, May, 1897, Ball. 



20. C. stricta angustata Bailey in Gray's Man., 6th ed., 



600 (1890). 



C. angustata Boott, in part. Hook. Fl. Bor. Am. n, 218 (1840), 

 Illus. Flora, 1, 208; Bailey in Gray's Man., 1. c; Smythe, PI. Kansas, 23; 

 Williams, Grass. & For. PI. Daks., 43. 



Swales, central and eastern portions of the state; distin- 

 guished by its stricter habit, longer and more slender spikes, 

 and narrow scales. 



Eldridge, Scott county, June, 1895, frequent, Barnes & 

 Miller ; Johnson county, May, 1895, Shimek. 



21. C. haydeni Dew. Am. Jour., 2nd ser., xvm, 103 



(1854). 



C. aferta Carey in Gray's Man., 1st ed., 547 (1848), not Boott (1840). 

 C. stricta var. decora Bailey, Bot. Gaz., xiu, 85 (1888). 

 Illus. Flora, 1, 308, fig. 970; Gray's Man., 6th ed., 600; Arthur, Fl. Iowa, 34; 

 Tracy, Fl. Mo., 92; Brendel, Fl. Peoriana, 88; Hale, Add. Fl. Wis., 5; 

 Williams, Grass. & For. PI. Daks., 43. 



