(10) 



I. Lepturus. 



b. Spikelets all sessile on alternating notches 



of the rachis. 



1. Lolium. Terminal spikelet with 2 

 glumes, lateral spikelets but one glume. 



2. Hordeum. Spikelets 3 at each notch of 

 the rachis, 1-flowered. Fruit a caryop- 

 sis wrapped and grown together with 

 the palese. 



3. Elyinus. Spikelets 3 at each notch of 

 the rachis, 2 co-flowered. 



4. Gymnostichum. Spikelets 1-3 at each 

 notch of the rachis. Gluuue rudiment- 

 ary or 0. 



5. Triticum. Spikelet 1 at each notch of 

 the rachis. Glumas 2, placed right and 

 left (not dorsal and ventral.) 



c. Spikelets pedicillate, 1- -^-flowered, but only 



1 flower regularly developed. 



aa. Spikelets dorsally compressed. 



1. Panicum. Glumae 3, the lowermost very 

 small. Involucre 0. 



2. Setaria. Glumse 3, the lowermost small; 

 bristly involucre below the spikelet. 



bb. Spikelets laterally compressed. Glumce 3. 

 The two inferior florets rudimentary, ter- 

 minal floret only developed. 



