G31 



ROTHROCK GRAMA 



Boutelou'a rothrock'ii 



Flower head (raceme) upright, con- 

 sisting of 4 to 12 (usually 4 to 6) flower 

 groups (spikes) 



red- 

 indi- 







Spikes narrow, 1 to l%in. lor 

 dish purple, with many, crowd* 

 vidual flower groups (spikelets) in 2 

 rows like teeth of comb on 1 side of the 

 central axis (rachis) 



Spikelets 2- (sometimes 3-) flowered; 

 lowest flower perfect, stalkless; upper 

 flower (or flowers) imperfect, reduced to 

 bristles and bracts, stalked, hairy 



Outer flower bract (lemma) of perfect 

 flower loosely hairy with long, white 

 hairs, 4-lobed; lobes with hairy-fringed 

 margins, and -with 3 short bristles (awns) 

 arising from between them. 



Lowest (2) spikelet bracts (glumes) 

 unequal, 2-toothed, persistent; 2d 

 glume with a very short awn between 

 the teeth 



Stalks (culms) erect, leafy (especially 

 below), mostly unbranched 



Leaves numerous, 2 to 4 in. long, 

 mainly basal and on the lower portion 

 of the stem. 



Roots fibrous, ra.tb.er shallow 



