226 GRASSES OF IOWA. 



about l to i-J inches (1-3 cm.) long, more or less pubescent, acute, 

 spreading. Panicle narrow, lax or dense, 1 to i4 inches (2-3 cm.) long, 

 sometimes capitate. Spikelets linear-lanceolate, strongly flattened, 1 

 line (2 mm.) or less wide, 2 to 6 lines (4-12 mm.) long, ten to forty- 

 flowered ; empty glumes ovate, acute, the first a little longer than the 

 second, hyaline excepting the prominent, green mid-nerve; flowering 

 glume ovate-lanceolate, acute, ^ to 1 line (ii-2 mm.) long, prominently 

 3-nerved. Palea two-keeled, keels scabrous ; grain spherical-oblong. In 

 ditches and sandy banks of streams. July to October. 



Eragrostis hypnoides is abundant on the wet shores of the pres- 

 ent flood plains of our streams near the water, or on the banks of lakes. 



DISTRIBUTION. 



Iowa. Ames, 3197 (Hunt and Rolfs) ; 3254 and 3140, Lansing 

 (Miss King) ; Ames, 905 (Hall, Beardslee, Kaufman, Hitchcock, Pam- 

 mel) ; Johnson County (Shimek) ; Carroll 1099, Marshal ltown 2_y) 

 Clinton, Hawarden, 630 Des Moines, Missouri Valley, Story City, 

 1032 Turin, Des Moines, Boone (Pammel) ; 1098 Boone, Winterset 

 (Carver); Ledges, Boone County, 108 (Pammel and Ball); Dallas 

 Center, 751 (Rhinehart) ; Manchester, 754 (Ball) ; Sioux City (Miss 

 Wakefield); Keokuk (P. H. Rolfs); Birmingham, 1039 (Baldwin); 

 Wadena (Fink); Emmet County (Armstrong, Cratty) ; High Bridge, 

 Dallas County (Shimek) ; Story County (Hitchcock) ; Iowa City (Miss 

 Linder) ; Des Moines County (Bartsch); Johnson County (Shimek). 



North America. Vermont to Ontario and south to Kentucky 

 (Harlan County, Cumberland River, Kearney, 55), Illinois (Indian 

 Lake, Eggert), Minnesota (Parry), Missouri (Jefferson Barracks, 

 Pammel), Texas (Joor), Mexico (San Luis Potosi, Palmer), Cali- 

 fornia and Washington. 



General. West Indies, Trinidad to Argentina. 



2. ERAGROSTIS CAPILLARIS. 



Eragrostis capillaris Nees. Agrost. Bras. 505. 1829. Watson and 

 Coulter. Gray. Man. Bot. 661. 1890. (6th ed.) Scribner. Grasses of 

 Tenn. Bull. Univ. of Tenn. Agr. Exp. Sta. 7: 96. /. 12S. 1894. 



Eragrostis capillaris (L.) Nees. Beal. Grasses of N. A. 2: 481. 

 1896. Scribner. Bull. U. S. Dept. Agr. Div. Agros. 17: 218. /. 514. 1896. 

 Nash in Britton and Brown. 111. Fl. 1: 188. /. 428. 1896. 



Poa capillaris^.. Sp. PI. 68. 1753. 



Poa tenuis Ell. Bot. S. C. & Ga. 1: 156. 



