BLACK GRAMA 



Boutelou'a erio'poda 



G28 

 (2 leaves) 



' Flower heads (racemes of spikes) 4 to 

 6 in. long, with 2 to 8, commonly 4 to 5, 

 flower groups (spikes) 



Spikes about 1 in. long, loose, on short, 

 woolly stalks, each bearing 12 to 20 

 individual flower groups (spikelets); 

 enlarged spike (A) 



Spikelets about % in. long, loosely ar- 

 ranged like teeth of a comb, in 2 rows on 

 1 side of spike axis (rachis), each with 1 

 perfect flower (floret) and 1 reduced 

 floret (rudiment) 



Rudiment short-stalked, above the 

 perfect floret, reduced to 3 equal, harsh- 

 hairy beards (awns) 



iner flower bract (palea) 

 2-toothed at tip, awnless 



uter flower bract (lemma) 

 3-awned, the 2 side awns 

 very short 



Lowest (2) spikelet bracts (glumes) 

 1-nerved, sharp-pointed or very short- 

 awned at tip, hairless; 1st glume about 

 K as long as 2d glume 



Stalks (culms) white-woolly, some- 

 what wiry, branched, ascending or 

 creeping, 3 to 36 in. long 



Leaves smooth, narrow, inrolled, 1 to 

 5 in. long; leaf sheaths hairless 



Roots numerous, fibrous, 

 finely divided, well developed 

 in upper 10 in. of soil 



Ruimers (stolons) widely creeping 

 on ground, sending up new stalks 

 and rooting at joints 



