94 



Fig. 88. ARISTIDA TUBERCULOSA Nutt. Gen. 1 : 57. 1818. LONG-AWNED 

 POVERTY-GRASS.— A rigid, much-branched perennial 3-4 5 dm. (12'-18') 

 high, with nearly simple panicles 10-18 cm. (4'-7') long, branches erect, 

 rather distant, the lower in pairs, one short and few-flowered, the other elon- 

 gated and many-flowered. Empty glumes nearly equal, 24 mm. (12") long, 

 awn-pointed; flowering glume (b) about 20 mm. (10") long, twisted above to 

 the division of the awns and with a densely barbate, sharp-pointed callus; 

 awns nearly equal, divergent or reflexed, 3-5 cm. (U'-Z') long, distinctly articu- 

 lated with the glume.— Dry, sandy soil, near the coast. Mas.sachusetts to Mis- 

 sissippi: also in Illinois, Wisconsin, and Minnesota. August to October. 



