404 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



cm long, the branches spreading or sometimes reflexed, rather distant, 

 naked at base, as much as 8 cm long or even more, the spikelets 

 crowded along the upper part of the main branches; spikelets from 

 pale to leaden, 2 to 2.5 mm long ; first glume one-third to half as long, the 

 second about as long, as the acute lemma and palea. 01 — Sandy open 



Figure 838— Sporobolus argulus. Pan- 

 icle, X 1; glumes and floret, X 10. 

 (Hitchcock 5343, Tex.) 



Figure 839.— Distribution of 

 Sporoboms argutus. 



Figure 837. —Sporobolus pur- 

 purascens. Panicle, X 1; 

 glumes and floret, X 10. 

 (Hitchcock, Tex.) 



Figure 840.— Sporobolus domin- 

 gensis. Plant, X 1; glumes and 

 floret, X 10. (Hitchcock 530, Fla.) 



ground, Maine and Ontario to Alberta and Washington, south to North 

 Carolina, Indiana, Louisiana, Arizona, and northern Mexico (fig. 842). 

 21. Sporobolus flexuosus (Thurb.) Rydb. Mesa dropseed. 

 (Fig. 841, B.) Resembling S. cryptandrus, differing in the more open 

 often elongate panicles, the slender branches and branchlets spreading 



