-.62 NATURAL HISTORY BULLETIN. 



Rare in low ground; central portion of the state. 



Ames, June i, 1877, Arthur, and another collection, John- 

 son; Poweshiek county, July 4, 1886, Johnson; Charles City, 

 July, 1875, Arthur. 



74. C. tenera Deiv. Am. Jour. Sci., vin, 97 (1824). 



C. stramtuea var. aperta Boott, 111. Car. 120 (1S62). 



C. straminea var. tenera Bailey, Bot. Gaz. x, 381 (1SS5). 



Illus. Flora. 1., 358. fig. S70; Gray's Man., 6th ed., 622 ; Bruhin, Zwei. Nach. 

 Fl. Wis., 643; Williams, Grass and For. PI. Daks.. 43; Higley & Raddin 

 Fl. Cook Co., Ills., 138. 



Rare in low ground. 



Spirit Lake, June 21, 1881, Arthur; Emmet connty, 1884, 

 Cratty ; Johnson county, May 28, 1894, Shimek; Ames, Car- 

 ver ; Jasper county, 1886, JYorris. 



Part of the above are not typical, but seem best referred 

 here. The perigynia are broader than would appear from the 

 figure in the Illustrated Flora. In the Emmet and Johnson 

 county plants the spikes are 3 to 5, light colored, the upper two 

 usually contiguous. Dr. Arthur collected a large form at Ames 

 which appears to connect this with the next. 



75. C. festucacea Willd. Sp. PL, iv., 242 (1825). 



C. straminea var. brevior Dew. Sill. Jour, xi., 158 (1826). 



Illus. Flora. 1., 359, fig. 871 ; Gray's Man., 6th ed., 622 ; Arthur, Fl. Iowa, 34, 

 and Cont. Fl. Iowa, v.; MacMillan, Metas. Minn. Val., 106; Bruhin, 

 Zwei, Nacht, Fl. Wis , 643; Webber, App. Fl. Neb., 23; Williams, Grass 

 & For. PI. Dak-.. 43; Higley & Raddin, Fl. Cook Co., Ills., 138. 



Common on prairies everywhere throughout the state; very 

 variable. 



Charles City, June 29, 1875, Arthur; Lyon county, 1896, 

 and Johnson counny, 1894-5, Shimek; Iowa City, 1889, Hitch- 

 cock; Hamilton county, 1891, Rolfs; Lucas county, Shepherd; 

 Emmet county, 1896, Cratty; Ames, 1897, Arthur; Eldridge, 

 June, 1897, Barnes & Miller; Spirit Lake, 1881, Arthur; 

 Decatur county, Aug., 1897, Fitzpatrick ; Lyon county, 1897, 

 and Keokuk, June 1, 1897, Shimek; Charles City, June, 1874, 

 Arthur; Des Moines, May 17, 1897, L. H. & Emma P am- 



