GRASSES OF IOWA. 67 



glumes, the latter having sometimes a hyaline palea in its axil; floral 

 glume elliptical, subacute, smooth ami shining, a little shorter than the 

 larger outer glumes. Anthers saffron yellow. Sprouting crab grass is 

 widely naturalized in mam parts of the state, appearing along railroads, 

 roadsides and in streets. .March to October. 



DISTRIBUTION. 



Iowa. Keokuk (Rolfs); Boone, 3203 (Pammel); Boone Viaduct, 

 3288 (Pammel); I )e Witt, 14s.-; (Pammel); [ndianola, Winterset 



(Carver) ; Dixon, 7 30 (Snyder) ; Des Moines. (>4<) ( Pammel) ; Chari- 

 ton, O77 (Mallory) ; Amana, 696 (Schadt) ; Manchester, [030 (Hall) ; 

 Maquoketa (Goodenow) ; Onawa, Carroll, Des Moines, Clinton (Pam- 

 mel) ; Dallas Center, 816 (Rhinehart) ; Greenfield, Marshalltown 

 (Stewart) ; Ames (Hitchcock, Bessey, Sirrine) ; Manchester, 39 (Hall) ; 

 Sioux City (Wakefield); Mt. Pleasant (Mills); Lebanon, 35 (Hall 

 and Sample); Newton (Misses Cavanaugh and Dilne); Johnson 

 County (Shimek); Hamilton to Hancock County (Preston); Iowa 

 City (Macbride, Shimek, Hitchcock); Slater ( Fawcctt and Tener) ; 

 Eagle Grove (J. H. Buchanan). 



North America. Maine to Maryland; Virginia (Portsmouth, 

 Noyes), District of Columbia (Washington, Vasey), Ohio (Columbus, 

 Sullivant), Florida (Lake City. Combs), west to Alabama, Tennessee 

 and Mississippi (Tracy), north to Missouri (St. Louis, Pammel; 

 Wickes, Pammel; Jefferson, E^ert), Kansas, Nebraska, Iowa, Wis- 

 consin and Illinois (St. Clair County, Eggert). 



12. PANICUM VIRGATUM. 



Panicum virgatutn L. Sp. PI. 59. 1753. Watson and Coulter. Gray. 

 Man. of Bot. 631. 1690. 16 ed.) Scribner. Grasses of Tenn. Bull. Univ. 

 Tenn. Agr. Exp Sta. 7: 42. /. 35. 1894. Scribner. Am. Grasses. Bull. 

 U. S. Dept. Agr. Div. Agros. 7: 60. / 54. 1S00. (3 ed.) Scribner and 

 Merrill Rhodora 3: 103 Vasey Contr. U. S. Nat. Herb. 3: 36. Beal. 

 Grasses of N. A. 2: 123. 1896. Nash in Britton and Brown, 111. PI. 1: 

 122. /. 213. 1896. 



