Ko. 50. 



ORCUTTIA GREENEI Vasey, Bot. Gaz. xvi. 146. 



Plant apparently annual, in small tufts of about a dozen culms from a root. 



Culms erect or ascending, rigid, terete, finely pubescent, 5 to 10 inches high. 



Leaves of culm 5 to 8; sheaths open, loose, striate, pubescent or somewhat gla- 

 brate, shorter than the nearly equal internodes; blades erect, rigid, loosely involute, 

 scabrid, 2 inches or less long; ligule obsolete. 



Inflorescence a narrow, spicate, jagged panicle, 1 to 3 inches long, usually included 

 at base in the upper sheath. 



Spikelets sessile, appressed, ovate or oblong, compressed, 9- to 15-flowered, 4 to 6 

 lines long; empty glumes oblong, wider above, oblique, 3-toothed at the apex, scarious- 

 margined, rigid, prominently 7- to 9-nerved, sparsely pubescent, about 2 Hues long ; sec- 

 ond glume slightly larger; floral glume broadly oblong, somewhat carinate, rigid, 

 scarious-margined, sparsely pubescent, 2£ lines long, with 5 to 7 prominent nerves 

 terminating in as many teeth and as many or more less prominent nerves terminating 

 at the sinuses ; palet oblong, wider toward the erosely 4- toothed apex, 2 lines long, with 

 2 rigid green keels; grain ovate-oblong, yellow, opaque, 1 line long; internode of 

 rachilla \ line long, nearly smooth. 



Plate L; a, spikelet enlarged 4 times; b, floral glumes; c, palet, dorsal view. 



Chico, northern California. 



