71 



I 



Fig. 65. CH-ffiTOCHLOA VIRIDIS (L.; Se-ribn. U. S. Dept. Agr. Div. Agros. 

 Bui. 4: 39. 1897. ( Panicum viride L. Sp. PI. ed. 2, 83. 1769; Setaria viridis Beauv. 

 Agrost. 51. 1812.)— An erect, glabrous, eaespitose annual, 2-9 dm. (|0-3°) high, 

 with short, lanceolate leaves and dense, cylindrical, spike-like green xjanicles 

 2-10 cm. (1'^') long. Culms usually much branched at the base, glabrous; 

 nodes smooth; leaf-blades 0.5-2.5 dm. (2'-10') long, 4-10 mm. (2"-5") wide, long- 

 acuminate, slightly scabrous on both sides; setae .slender, strict, spreading, 

 antrorsely scabrous, 1-1.5 cm. (5"-7i") long, green or rarely purplish. Spikelets 

 (f/,6, c) about 2 mm. (1") long; second and third glumes 5-nerved, equaling the 

 spikelet; flowering glume (d) elliptical, rounded at the apex, finely and faintly 

 tran.sversely wrinkled below, or only striate and pitted.— In waste places and 

 cultivated grounds throughout North America. Naturalized from Europe. 

 July to September. 



