WEED FLORA OF IOWA 



Fig. 15-B. Poverty Grass (Aristida tuberculosa). Corr.mon in gravelly and 



sandy fields. 

 (Photographed by Colburn.) 



Nimble Will {Muhlenberg la schreberi J. F. Gmel.). 



Description. — A low, ascending perennial with slender, much- 

 branched, wiry culms, 1-2 ft. long; sheaths smooth, pilose at the 

 throat; ligule very short; leaf-blade 1-2 lines wide, 1-4 in. long, 

 scabrous on both sides; panicles 3-7 in. long, slender, branches 

 erect, rather densely flowered; spikelets 1 line long, equaling or 

 exceeding the pedicels; empty glumes minute, unequal, the lower 

 sometimes obsolete; flowering glume narrowly lanceolate, pilose 

 near the base, scabrous on the nerves above, terminating in a 

 slender straight awn, 1-2 lines long; palea equaling the glume. 

 Shaded thickets. 



