202 



Fig. 196. BOUTELOTJA ARISTIDOIDES (H. B. K.) Thurb. in S. Wats. Bot. 

 Calif. 2 : 291. 1880. {Dimhra aristidokks H. B. K. Nov. Gen. et Sp. PI. 1 : 171. 

 1815.) SIX-WEEKS MESQUIT.-A slender. den.sely tufted and much branched 

 annual (?) 1-3.5 dm. (4'-14') high, with short, narrow leaves, and three to 

 twelve very narrow and few- (sometimes only one-) flowered spikes 1-1.5 cm. 

 fi"-J") long. Sheaths short, striate, .smooth, except for a few scattered hairs 

 near the apex; leaf-blades very narrow, erect, 4-10 cm. (li'-4') long. Spikelets 

 5-7 mm. (2^"-3^") long; the second glume (a) twice as long as the first; flowering 

 glume {b, c) pubescent, terminating in three short awnlike teeth; pedicel of 

 rudiment slightly bearded, as shown by (b), 3-5 mm. {iy'-2i") long.— Texas to 

 southern California. (Mexico and Lower California.) August to September. 



