G21 



SINGLE-AWN ARISTIDA 



Aris'tida orcuttia'na, syn. A. schiedea'na 



Flower head (panicle) open, up to 

 half the length of entire plant, with 

 slender, rigid, ascending or widely 

 spreading branches flower-bearing to- 

 wards the tips 



Leaves narrow, flat or inrolled, up 

 to 12 in. long, smooth to rough 



Stalks (culms) somewhat tufted, erect, 

 usually 1 to 2 ft. high, slightly harsh 



Individual flower groups (spikelets) 

 1-flowered, short-stalked 



Outer flower bract (lemma) firm, 

 closely enfolding the "seed", with a 

 rather blunt, hairy point (callus) below, 

 tipped by a twisted, bent, unequally 

 3-parted beard (awn); middle branch 

 of awn spreading, about % in. long; 

 side 2 branches reduced to mere points 

 or lacking 



Lowest (2) spikelet bracts (glumes) 

 often purplish, sharp-pointed or short- 

 awned at tips', unequal; first glume 

 about % in. long, longer than second 

 ume 



Roots thickened-fibrous, perennial 



