THE IOWA SEDGES. 



329 



Rather rare in swamps and along the edges of ponds. 

 Probahlv throughout the state. 



Ames. 1885, and Davenport. 1889, Hitchcock ; Walled Lake. 

 1889. Bessey; Powesheik county. June. 1885, Johnson; Scott 

 and Muscatine counties, Barnes <.(• Miller; Granite. Lyon 

 county, June, 1897. Shimck. 



3. S. LACUSTRIS L. Sp. PI . I, 48 (l753). 



.V. validus Vahl. Enum, 11, 268 (1806). 

 Illus. Flora, i. 266, fig. 623; Gray's Man., 6th ed., 580: Arthur, Fl. Iowa. 33: 

 Hitchcock, PI. Ames, 523; MacMillan, Metas. Minn. Val., 98; Tracy, 

 Fl. Mo., 'j2 ; Dessev, Cont. Fl. Iowa, 123; Brendel, Fl. Peoriana, 62; 

 Wheeler, Fl. Milwaukee Co., Wis., 186; Rvdberg, Fl. Sand Hills, Neb., 

 184; Rvdberg, Fl. Bl. Hills, S. D.. 526; Fink, Iowa Acad. Sci., iv, 105. 



Our most common species: shallow water, margins of 

 streams and lakes. Varies greatly in the size of its spikes 

 and panicle, the culm from ^ to i inch in diameter at the base. 

 The leaves of this species are reduced to basal sheaths. 



Ames, 1884, Hitchcock; Emmet county, 1890, and Spirit 

 Lake, 1896, Cratty; Monticello, 1876, Bessey ; Lavvler, 1876, 

 Rolfs; Charles City. Arthur; Greene, 1891, Miss Price: 

 Fayette count}-. 1894. fink ; Powesheik county, June. 1895. 

 Johnson; Allamakee county, 1897, Pummel ; Scott and Mus- 

 catine counties, Barnes tic Miller ; Kossuth county, July 21, 

 1897, Pammel. 



4. S. fluviatilis (Torr.) Gray, Man , 1st ed., 527 (1848). 



•S". maritimus var. fluviatilis Torr., Ann. Lye. iv, N. Y., in, 324 (1S36). 

 Illus. Flora, 1, 268, fig. 628; Gray's Man., 6th ed., 581; Arthur, Com Fl. 

 Iowa, tit; Hitch:jjv, Pi. Ani>, 523; MacMillan. Metas. Minn. Val., 

 98; Tracy, Fl. Mo., 92; Brendel, Fl. Peoriana, 88; Bruhin, Fl. Wis., 

 278; Rydberg, Fl. Sand Hills, Neb.. 184: Williams, Grass, and For. 

 PI. Daks., 42. 



Marshes, central, and northern portions of the state, less 

 common than the preceding. A very coarse plant with 

 numerous leaves, one-half inch or more in width, and lartre. 

 triangular black akenes, 2 lines long. 



Ames. 1885, and Carnsforth, Hitchcock ; Emmet and Kos- 

 suth counties, Cratty; Ames, 1877. Arthur ; Jasper county, 

 1886, Johnson. 



iv 4 2 E 



