CHLOKIDE.E. 



409 



broader and much shorter; empty ghimes sometimes 2-3, the low- 

 est much like the floral glume, those above smaller, 1-awned or awn- 

 less or sometimes only one; palea included by its glume, hyaline, 

 2-keeled near the margins. Stamens 3. Styles distinct, stigmas 

 feathery. Grain narrow, oblong, subterete, pericarp easily removed 

 from the seed. 



Tall grasses with flat blades. Spikes many, slender, sessile, 

 erect or spreading on the peduncle, forming a dense oblong panicle, 

 softly echinulate with many long bristles. Spikelets slender, erect. 



¥iG. 7Z —Chloropsis pltirtfloj'a. Spikelet dissected. (Scribner.) 

 There are four or five species known, of which 2 are found from 

 Texas to Arizona and two in South America. Nearly allied to 

 Trisetaria and to Chloris. 



Spikelets 3-5-flowered 1 



Spikelets mostly 2-flowcred 3 



