230 GRASSES OF IOWA. 



Amana, 703 (Schadt) ; Manchester, 721 (Hall); Granite, 17 

 (Shimek) ; Lake Edwards, Hancock Count}- 8 (Shimek) ; Ames, 

 161 (Ball); Camanche (Ball); Wheatland (Ball); Mt. Ayr 

 (Beard) ; Carroll, Logan, Council Bluffs, Jefferson, Dakota City, 

 South Dakota opposite Hawarden, 801 Des Moines, 292 Car- 

 narvon, Turin, Clinton (Pammel); Lake Edwards, Hancock County, 

 8 (Shimek) ; Emmet County, 1052 (Cratty) ; Harcourt, 1095 (Daniel- 

 son J ; Le Claire ( F. M. Rolfs); Iowa City (Hitchcock); Lawler, 

 Keokuk (P. H. Rolfs); Maquoketa (Goodenow); Marshalltown 

 (Eckles) ; Colfax (Mead) ; Fayette (Fink) ; Taylor County (Pool) ; 

 Dixon, 736 and 714 (Snyder) ; Glenwood, 693 (Jackson) ; Mt. Pleas- 

 ant, 687 (Witte) ; Des Moines, 30 (Ball) ; Boone, Indianola, Jewell 

 Junction (Carver); Keystone (Koch); Marshalltown (Stewart); De- 

 catur County ( Fitzpatrick) ; Belknap, 822 (Rankin) ; Muscatine (Rep- 

 pert) ; Alden, 1 1 55 and 1131 (Stevens); Jewell Junction (Carver); 

 Carnforth (Pammel); Keosauqua (Shimek); Traer (Provan). 



North America. Naturalized in cultivated and waste grounds. On- 

 tario to New England to Xew Jersey (Rariton Landing, Halsted), Min- 

 nesota (Crow Wing, Sandberg, 864), Wisconsin (La Crosse, D. S. 

 Pammel and C. M. King), Missouri (St. Louis. Pammel; St. Louis, 

 Egbert), Nebraska (Snyder, Miller; Aurora, McCook; Pammel), 

 South Dakota (Randall, Griffith), Indian Territory (near Ft. Smith, 

 Arkansas, Rolfs); Texas (Pammel), Colorado (Larimer County, 

 Five; Denver, Pammel, Lummis, Johnson and Buchanan, 909), Wyo- 

 ming (Green River, S. M. Tracy), Mexico (Parry and Palmer). 



General. Central Europe, Asia and Africa. 



4-A. ERAGROST1S MEXICANA. 



Eragrostis Mexicana Link. Hort. Berol. 1: 190. Nees. Agrost. 

 Bras. 503. Doel. in Mart. Fl. Bras. 2: 3. 143. Fourn. Mex. PI. Enum. 

 Gram. 114. Watson Am. Acad. 18: 182. 



DESCRIPTION. 



Mexican F.ragrostis. Culms 1 to 2 feet (3-6 dm.) high, panicle 

 oblong; branches smooth, single or somewhat verticillate, ascending: s 

 inches (1 dm.) long, or less; spikelets four to ten-flowered, I to 3 lines 

 6 mu/.) long; empty glumes half as long as the contiguous florets; 

 floral glume subacute, hispidulous on the keel, one-fourth longer than the 

 hispidulous palet; grain oblong, oblique, nearly smooth under a glass, 

 about 0.8 mm. long. 



