176 Paniceae Setaria 



2. Echinochloa Walteri (Pursh) Heller. Map 325. Infrequent to local 

 in the lake area, with one specimen from the muddy flat of a bayou in 

 Posey County. In the lake area it is found in wet places about lakes, often 

 in shallow water, and at the water edge in rivers. 



Mass. to Fla., and Tex. ; N. Y. to Wis., Iowa, and Ky. 



2a. Echinochloa Walteri f. laevigata Wieg. (Rhodora 23: 62. 1921.) 



This is a form with glabrous sheaths, which I have from Posey and Starke 

 Counties. 



135-171. SETARIA Beauv. 



[Scribner & Merrill. The North American species of Chaetochloa. U. S. 



Dept. Agric. Div. Agrost. Bull. 21: 1-44. 1900. Hubbard. A taxonomic 

 study of Setaria italica and its immediate allies. Amer. Jour. Bot. 2: 



169-198. 1915. Hitchcock. The North American species of Chaetochloa. 



Contr. U. S. Nation. Herb. 22: 155-208. 1920. Copple & Aldous. The 



identification of certain native and naturalized grasses by their vegetative 



characters. Kansas Agric. Exper. Sta. Tech. Bull. 32: 1-73. 1932.] 



Bristles below each spikelet numerous, at least more than 5, upwardly scabrous. 

 Blades usually with a half twist beyond the middle; spikelets about 3 mm long, 

 very turgid on the convex side; second glume slightly more than half as long 



as the spikelet 1. S. lutescens. 



Blades without a twist beyond the middle; spikelets 2-2.5 mm long; second glume 

 almost as long as the spikelet. 

 Fruit disarticulating with the spikelet below the glumes, leaving a cup-shaped scar. 



2. S. viridis. 



Fruit disarticulating above the glumes 3. S. italica. 



Bristles below each spikelet 1 or, by abortion of the spikelets, 2 or 3; bristles down- 

 wardly scabrous 4. S. verticillata. 



1. Setaria lutescens (Weigel) F. T. Hubb. (Setaria glauca and 

 Chaetochloa glauca of authors.) Yellow Bristlegrass. Yellow Foxtail. 

 Map 326. A common weed throughout the state in cultivated grounds and 

 waste places and along roads and railroads. 



Nat. of Eu. ; widely distributed in temperate regions. 



2. Setaria viridis (L.) Beauv. (Chaetochloa viridis (L.) Scribn.) 

 Green Bristlegrass. Green Foxtail. Map 327. A common weed through- 

 out the state in cultivated and waste grounds and along roads and rail- 

 roads. It is not as common as the preceding species. 



Nat. of Eu. ; common throughout the cooler parts of the U. S., infrequent 

 in the southern states and in the mountains; Newf. to B. C, southw. to 

 Fla. and Calif. 



3. Setaria italica (L.) Beauv. (Chaetochloa italica (L.) Scribn.) 

 Foxtail Millet. Map 328. This species has been sparingly sown as a 

 forage crop and has escaped. For detailed information on the value of the 

 species as a forage crop and its culture, see H. N. Vinall on Foxtail Millet 

 (U. S. Dept. Agric. Farmers' Bull. 793). 



Nat. of Eurasia; escaped in waste places and roadsides throughout the 

 U.S. 



