J 



o(5 NATURAL HISTORY BULLETIN. 



A very striking plant, well distributed throughout the south- 

 ern and eastern portions of the state. The perigynia crowded 

 in globose heads, otherwise much resembling C. intumescens 

 Rudge. 



Johnson county, 1894, and Keokuk, 1895, Shimek; Ames, 

 •Hitchcock; Richland tp., Jasper county. July 4, 1884. the 

 hispid form, IVorris, and 1886, Johnson; Clinton, Scott, and 

 Muscatine counties, frequent, Barnes & Miller : Appanoose 

 county, July 4, 1889, Fitzpatrick. 



3. C. lupulina Muhl. Schk. Riedg., 11, 54 (1806). 



Illus, Flora, i, 294, fig. 678; Gray's Man., 6th ed , z,<jt,: Arthur, Fl. Iowa, 34: 

 Hitchcock, PI. Ames, 524; Mac Mil Ian, Meta>. Minn. VaL, 129; Tracy, 

 Fl. Mo., 93; Brendel, Fl. Peoriana, 63; Wheeler. Fl. Milwaukee Co., 

 Wis., 1S7; Bot. Surv. Neb., iv., 45; Fink, Iowa Acad. Sci., iv, 105. 



Margins of swamps; throughout, but not plentiful. The 

 more common form has the spikes peduncled ( var. peduncu- 

 lata Dew.). C. lupuliformis Sartwell, is reported from 

 Minnesota and possibly occurs within our limits. 



Emmet county, south shore of Iowa Lake, 1896, Cratty,- 

 Johnson county, 1894, Shimek, and Iowa City, 1887. Hitch- 

 cock; Fayette county, 1894, Fink,- Mississippi bottoms, La 

 Crosse, Wis., 1887, Pammel; Ames, 1886, Hitchcock; Jasper 

 countv, July 4, 1884, and May, 1886, Johnson: Clinton, Scott 

 and Muscatine counties, Barnes & Miller: Charles City, Aug., 

 1875. Arthur: Johnson county, July, 1897, Misses Finch & 

 Cavanagh; Keokuk, June 1, 1897, Shimek: Ames, July 

 1894. Stewart. 



4. C. monile Tuck. Enura. Meth. 20 (1843). 



Illus. Flora, i, 297, fig. 688; Gray's Man. 6th ed.. 594: Arthur, Cont. Fl. 

 Iowa, v; MacMillan, Metas. Minn. Val., 128; Tracy, Fl. Mo., 94: Bren- 

 del, Fl. P.eoriana, 63; Wheeler, Fl. Milwaukee Co., Wis., 187. 



Very low ground, growing in dense tufts; the whole plant 

 light colored, especially the fertile spikes. 



Emmet county, 1887, Cratty ; Iowa City, a form much re- 

 sembling C. utriculata Boott, Hitchcock; Richland tp.. Jasper 

 county, May 29, 1886, JVorris ; Moscow. Muscatine county 

 and Noels, Scott county, Barnes Jc Miller. 



