86 



GRASSES OF IOWA. 



Xorth America. From New England, New Jersey (New Bruns- 

 wick, Halsted) to Virginia, Alabama, Texas, Mexico, to Missouri (St. 

 Louis, Pammel), Nebraska, Iowa and Illinois. Nova Scotia to New 

 Brunswick and Ontario. 



2. SETARIA GLAUCA. 



Setaria glauca Beauv. Agros. 51. 1812. Watson and Coulter. Gras . 

 Man. Bot. 634. pi. 13. 1890. (6th ed.) Scribner. Grasses of Tenn. Bull. 

 Univ. Tenn. Agrl. Exp. Sta. 7: 56. /. 62. 1894. Vasey. Contr. U. S. 

 Nat. Herb. 3: 38. 



Panicum glaucum L. Sp. PI. 56. 1753. 



Chamaeraphis glauca Kuntz. Rev. Gen. PI. 767. 1891. Chamaeraphis 

 glauca (L.) Kuntz. Beal. Grasses N. A. 2: 155. 1896. 



Ixophorus %laucus Nash. Bull. Torr. Bot. Club. 22: 423. 1895. Nash 

 in Britton and Brown. 111. Fl. 1: 126. /. 281. 1896. 



Chaetochloa glauca (L .) Scribn. Bull. U. S. Dept. Agrl. Div. Agros. 

 17: 105. /. 401. 1899. Bull, U. S. Dept. Agrl. Div. Agros. 4: 39. 1897. 

 Scribner and Merrill. Bull. U. S. Dept. Agrl. 21: 9. /. 1. 1900. 



description. 



Yellow Fox Tail or 

 Pigeon* Grass. An erect 

 annual, i to 2 feet, (2^-5 

 dm.) high, with flat leaves 

 and a bristly, cylindrical, 

 spike-like, densely flowered 

 panicle, 1 to 3 inches (2-6 

 cm.) long. Culm scabrous 

 just below the panicle, 

 otherwise smooth. Sheaths 

 smooth ; ligule a dense 

 fringe of smooth hairs; 

 leaf-blade 3 to 10 inches 

 (6-20 cm.) long, 2 to 5 

 lines (4-10 mm.) wide, 

 nearly smooth on the dorsal 

 surface, very scabrous on 

 the upper surface and mar- 

 gins, and occasionally pilose 

 near the base. Axis of the 

 panicle densely pubescent. 

 Bristles five to ten on each 

 spikelet, yellowish or rarely 

 purplish. Spikelets ovoid, 

 about 1^ lines (3 mm.) 



Fig. 62. Selaria glauca.— a, spikelet showing 



the second glume, the upper portion of the flowering 



glume and bristles: 6. spikelet showing the back long. rMrs!: glume aDOUt 



of the first and third glumes. (Div. Agros. U. 8. x y , \ 1 „ 



Dept. Agrl. ) • 2 line U mm.; long, 



