DESCRIPTIONS OF TRIBES AND GENERA. 



147 



206. (215) Echinaria Desf. (PanicastreUa Monch.). A 

 low annual. Spikelets in long-pedicellate, spiny, capi- 

 tate clusters ; 2-3-flowered. 



Species one (E. capitata Desf.) (Fig. 73), in the Medi- 

 terranean regions. 



207. Orcuttia Vasey. A low, prostrate annual, with 

 long spikelets in racemes ; empty glumes much like the 



flowering glumes, lobed. 



Species one (0. Californica 

 Vasey) (Fig. 73a), in Lower 

 California (San Quentin Bay). 



208. (216) Ammochloa Boiss. 

 (Cephalochloa Cosson & Dur.). 

 Spikelets small, in globose, 



FIG. 73. Echinaria capitata Desf. 

 (After Nees, Gen. Germ., I. 38.) 



A El. 



[Fie. 73a. Orcuttia Californica 

 Vasey. A, Portion of inflores- 

 cence. El, Floret with a portion 

 of the rachilla. D, Dorsal view 

 of expanded flowering glume. 

 E, Apex of palea. St, Stamen. 

 J. Pistil. (Original.)] 



capitate clusters, many -flowered ; flowering glumes three- 

 nerved with a rigid or cuspidate point. 



Species two ; low, annual, steppe and desert grasses : 

 A. pungens Boiss. in Algiers ; A. subacauLis from Algiers 

 to Palestine and South Spain. 



209. (217) Urochlsena Nees. Spikelets few-flowered ; 

 glumes 5-7-nerved and produced into long, divergent 

 and curved awns. 



