DESCRIPTIVE MANUAL 



29 



Fig. 15- A. Distribution of Poverty Grass. 



empty glumes nearly equal, longer than the flowering glume, 

 equaling the small lateral awns; the awns unequal,, the long mid- 

 dle awn horizontal, but soon becoming reflexed. . 



Distribution. — Poverty grass is common in dry, sterile, or clay 

 soil in southeastern Iowa. 



Extermination. — The fibrous roots of the plant are easily killed 

 by cultivation. 



Long-awned Poverty Grass (Aristida tuberculosa Nutt.). 



Description. — A rigid, much-branched perennial, 12-18 in. tall; 

 panicles simple, 4-7 in. long; erect, rather distant branches, the 

 lower in pairs of which one is short and few-flowered, the other 

 elongated and many-flowered; empty glumes, nearly equal, awn- 

 pointed, flowering glume, twisted above to division of awns; awns 

 nearly equal, articulated with glume. 



Distribution. — Common gravelly knolls and sandy soil, northern 

 and eastern Iowa. 



Extermination. — Succumbs readily to cultivation. 



