GENERA OF GRASSES OF THE UNITED STATES. 



195 



a fairly well developed lemma and palea, the fourth floret, if 

 present, usually reduced. 



Low cespitose or stoloniferous 

 annuals or perennials, with short 

 blades, and several or many short 

 deciduous spikes scattered along 

 the main axis. Species four, on the 

 Mexican Plateau, one extending 

 into western Texas. 



FIG. 115. Side-oats grama, Bouteloua curtipendula. Plant, X \ ; spikelet and floret 



with rudiment, X 5. 



Type species: Cathestccum prostratum Presl. 



Cathestecum Presl, Rel. Haenk, 1; 294, pi. 42. 1830. Only one species de- 

 scribed. 



