No. 14. 

 MUHLENBERGIA SCHAFFNERI Fourn. 



Plant low, annual or short-lived perennial. 



Culms tufted, procumbent or spreading, branching freely, 2 to 4 inches tall. 



Leaves ; radical, few and small; of culm 3 to 5; sheaths compressed, open, 

 striate, scabrous on both sides, margins white, * to 1 inch long; ligule membrana- 

 ceous, lacerate, f line long, decurrent in prominent hyaline margins on the sheath. 



Inflorescence a narrow contracted panicle, 1 to 2 inches long, often included at 

 base, rachis and branches angular, hispid. 



Spikelets sessile, appressed, narrow, H to 2 lines long; first glume lanceolate, the 

 apex lobed, with 2 short unequal or nearly equal teeth at apex, hispid, 2-nerved, her- 

 baceous, rigid, 1 to H lines long; second glume linear-lanceolate, acute, carinate, 

 short-awned at apex, hispid, 1-nerved, 1| to 2± lines long, including awn; floral 

 glume ovate, 2 minute hyaline teeth at apex, slightly hispid, ciliate below, 3-nerved, 

 with slender awn f to 2 lines long, or sometimes awnless; palet ovate, acute, 

 2-nerved, thin, smooth, li to 1| lines long. 



Grain narrowly cylindrical, reddish amber color, f line long, falling with palet 

 and glume but easily escaping. 



Plate XIV, No. 2, lower figure; a, first empty glume; b, second empty 

 glume; c, floral glume; d, palet. 



Arizona. 



No. 14. 

 MUHLENBERGIA DEPAUPERATA Scrib. 



Plant low, tufted, annual or short lived perennial. 



Culms spreading, branching at each node, 3 to 4 inches tall. 



Leaves; radical, few or none; of culm 2 to 4, with loose, smooth, broad, open 

 sheaths, and short folded or involute blades; ligule membranaceous, lacerate, de- 

 current. 



Inflorescence a narrow, contracted, rather close panicle, 2 to 3 inches long, 

 usually included below, rachis and branches angular, hispid, pedicels short. 



Spikelets narrow, 1-flowered, lh to 2 lines long; first glume ovate, obliquely 

 2-toothed at apex, scarious, minutely hispid, obscurely 1-nerved, f to 1 line long; 

 second glume lanceolate, narrowing at apex to a slender, awn-like point, scarious, 

 minutely hispid, 1 to 1^ lines long; floral glume narrowly lanceolate, with 2 minute 

 teeth at apex, rounded on back, hispid, 3-nerved, 1\ to 2 lines long, midnerve 

 excurrent in an awn 2 to 5 lines long; palet lanceolate, acuminate, rounded, envel- 

 oping grain, minutely pubescent, 2-nerved, 1^ to If lines long. 



Grain narrowly cylindrical, reddish-amber, lighter above, 1 line long, falling 

 with palet and glume but easily escaping. 



Plate XIV, No. 1, upper figure; a, spikelet enlarged; b, empty glumes; c, 

 floral glume; d, palet. 



Very close to M. Schaffneri and perhaps but a variety of it. 



Arizona, 



