THE IOWA SEDGES. 



327 



Low ground, probably rare within our limits. Distinguished 

 from E. tenuis 1 Willd.) Schultes. which it somewhat resembles, 

 by its annual, fibrous root, smoother akene with persistent 

 bristles. 



Story City, 1891, Pommel; Charles City. Aug., 1S75, 

 Arthur. 



STEXOPHYLLUS Raf. Neog. 4 (1825). 



A genus of about 20 annual or perennial sedges, represented 

 in the northern United States by a single species. 



1. S. capillaris (Z.) Britton. Bull. Torr. Club. xxi. $0 

 (1894). 



Fimbristylis capillaris A. Gray. Man., 1st ed., 530 (184 

 lllus. Flora, 1, 25S, fig. 603: Gray's Man., 6th ed., 57S: Arthur, Cont. Fl. 

 Iowa iv: MacMillan, Metas. Minn. Val., 103: Tracy, Fl. Mo., 92; Bren- 

 del, Fl. Peoriana,SS: Hale. Add. Fl. Wis., 5: Webber. App. Fl. Neb., 24. 



Rare in sand on banks of streams: eastern portion of the 

 state. Readily distinguished from the next growing in similar 

 situations by its yery numerous and finely capillary culms. 



Fruitland, Muscatine county. Aug.. 1896. and Noels, Scott 

 county, Barnes 3: Miller; bank of Mississippi River at 

 Oquawka, Ills., Patterson. 



FIMBRISTYLIS Vahl. Enura.. 11. 285 (1806). 



A large genus with culms leafy below and bearing spike- 

 lets in small umbels or capitate heads. It differs from the 

 preceding genus in having the swollen base of the style de- 

 ciduous. 



North America, 8 or 9 species. 



Illus. Flora, 4: Gray's Man., 6th ed., 3: Tracy, Fl. Mo., 2; Webber, App. 

 Fl. Neb., 1. 



I. F. AUTUMNAL.IS (Z.) R. <& S. Syst., II, 97 (1817). 



Scirptis autumnalis L. Mont., 11, 1S0 (17S1). 

 Illus. Flora. 1, 260, fig. 60S; Gray- Man. 57S: Tracy, Fl. Mo., 92; Brendel, 

 Fl. Peoriana, 62. 



