2. 
5. Pistillate spikelets not embedded in the 
joints of the rachiss..c.s.csesceccceecesee Lizanieae (Expected) 
4, Spikelets perfect or, if umnisexual, the 
plants dioecious. 
6. Glumes minute or wanting; articulation 
bellowmthems . js. twee ssi lecwe sews es, Oryzeaea(pen 2d) 
6. Glumes, or at least one of them, well- 
developed; articulation above them. 
7. Spikelets sessile; rachis continuous 
except in Hordeum. 
8. Spikelets on opposite sides of the 
rachis; spikes terminal, solitary.... Hordeae (p. 29) 
8. Spikelets on one side of the rachis; 
spikes digitate or racemose.......... Chlorideae (p. 31) 
7. Spikelets pedicellate, in open, con- 
tracted, or spikelike panicles, rarely 
in racemes. (Spikelets subsessile in 
Phleum). 
9. Spikelets usually 1-flowered......... Agrostideae (p. 33) 
9. Spikelets 2- to several-flowered. 
10. Glumes as long as the lowest 
floret, usually as long as the 
spikelets; lemmas awned from the 
back (awnless in Sphenopholis, 
awned between the teeth of a 
bifid apex in Danthonia)......... Aveneae (p. 35) 
10. Glumes, or at least one of them, 
shorter than the first floret; 
lemmas awnless or awned from the 
tip, or from the back just below 
the tip, or from between the 
teeth of a bifid apex............ Festuceae (p. 37) 
