50 



GRASSES OF IOWA. 



1. PANICUM CRUS-GALLI. 



Panicum Crus-gal/i L. Sp. PI. 26. 1753. Watson and Coulter in 

 Gray. Man. 633. 1890. (6th ed) Scribner. Grasses of Tenn. Bull. Univ. 

 Tenn. Agr. Exp. Sta. 7: 39. /. 39. 1894 Bull. U. S. Dept. Agr. Div. 

 Agros. 7: 70./. 64. 1900. (3 ed). Scribner and Merrill. Rhodora 3: 93. 

 Beal. Grasses of N. Am. 2: 119. 1896. Vasey. Contr. U. S. Nat. Herb. 3: 

 37. Nash in Britton and Brown, 111. PI. 1. 113. /. 243. 1896. 



Oplismenus Crus-galli Kunth. Gram. 1: 44. 



DESCRIPTION. 



Barnyard Grass. A 



coarse, ascending or erect, 

 leafy annual i to 6 feet 

 (3- 1 8dm.) high, with more 

 or less dense panicles of 

 numerous erect or spreading 

 spikes 2 to 5 inches (5- 12 

 cm.) long. Spikelcts 1 to 

 1] lines {2-^ mm.) long, 

 densely and irregularly 

 crowded in three or four 

 rows along one side of the 

 axis; first glume one-fourth 

 to one-half as long as the 

 third, pubescent or muri- 

 cate-hispid along the nerves, 

 the second awnless or short 

 awned, the third awnless or 

 with a long rigid awn. Al- 

 most everywhere in the 

 United States in barnyards, 

 waste ground and river 

 banks. Flowers all summer. 



Fig. 36. Panicum Crus-galli.-a, spikelet Barnyard grass is common 

 showing first and third glumes; d, ovary, stigmps throughout the State ; indige- 

 and palea. (D:v. of Agros. U. S. Cept. of Agrl. ) 



nous. 



DISTRIBUTION. 



Iowa. Woodbury County (Brown); Milford (Skiff); De Witt, 

 1457 and 1448 Jefferson, 886 Ledyard, Dakota City, Clinton, Carnar- 



