340 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
FIGURE 309.—Setaria lutescens. Plant, X 44; two views of spikelet, and floret, X 10 (Chase 2986). 
Perennial, producing short knotty branching rhizomes as much as 
4 cm long; culms erect to nearly prostrate, as much as 1 m tall, some- 
times dwarfed, the base usually hard and wiry, often more slender 
than the upper part; blades flat, scabrous, often more or less villous 
toward the base on the upper surface, commonly 10 to 20 em long 
and 4 to 8 mm wide; panicle erect, cylindric, densely flowered, 
rounded or truncate (not narrowed), at summit, 1 to 10 cm long or in 
robust specimens longer, 4 to 8 mm thick (excluding the bristles), 
yellow, purple, tawny, or greenish; bristles mostly 8 to 12, yellow or 
