296 POACE.E. 



terrupted, 2-5 cm. long, 4 mm. wide; rays 1.5 or less in length, 

 covered with spikelets. Empty glumes colorless or light lead-color, 

 equal or subequal, 1-nerved, ovate, almost acute, 1 mm. long; floret 

 with a callus, smooth, floral glume ovate, acute, 3-nerved, 1.7 mm. 

 long; palea as long as its glume, broadly oval, acute. 



Oregon, Hoioell; Mexico (Chihuahua), Pringle 418. 



A fine low grass filling much the place in grazing of S. asperi- 

 folms. 



Eocky Mountain region. 



Yar. filiformis uov. var. Culm 10-12 cm. long, exserted for 

 nearly half its length ; panicle much reduced, 2 cm. long. 



Montana, Williams; Utah, Jones. 



22. S. Indicus (L.) E. Br. Prodr. 1:170 (1810). Smut- 

 grass. Agrostis Indica L. Sp. PL 63 (1753). A. elongata Lam. 

 111. 1:162 (1791). 



An erect robust grass, 30-50 cm. high. Sheaths long, some- 

 times ciliate at the throat; ligule very short; blades chiefly at the 

 base of the culms, smootli below, scabrid above, those of sterile 

 shoots extending to the base of tlie panicle, 2-4 mm. wide at the 

 base, tapering into fine points, those of the culm 2-3 in number. 

 Panicle spikelike, but little exserted, sometimes interrupted, 8-20 

 cm. long and 3-6 mm. diam., or sometimes with diverging rays 1 

 cm. long. Spikelets very numerous and crowded; empty glumes 

 almost hyaline, obtuse, 1-nerved, first 0.5-0.7 mm. long, second 1 

 mm. long; floral glume oval, concave, 1-3-nerved, 1.7 mm. long; 

 palea nearly as long as its glume, 2-nerved. Grain broadly obo- 

 void, pericarp often evanescent. 



Bentliam in Flora Australiensis has been followed in the de- 

 scription to some extent. 



Florida, Curtiss 3383. 



It was introduced from India, and has become naturalized in 

 many warm countries, such as Florida, the Carolinas, etc. It is 

 called Srnnt-grass in the South, as smut very often develops on it. 

 The grass is esteemed for pasture and mowing when not too old. 



23. S. serotinus (Torr.) A. Gray, Man. Ed. 1:577 (1848). 

 Agrostis seroti?ia Torr. Flor. U. S. 1:88 (1824). Vilfa serotina_ 



