(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 
aa. 
bb. 
the rachis, 1-flowered. Fruit a caryop- 
sis wrapped and grown together with 
the palez. ‘ 
Elymus.—Spikelets 3 at each notch of 
the rachis, 2— o-flowered. 
Gymnostichum.—Spikelets 1-3 at each 
notch of the rachis. Glume rudiment- 
ary or 0. 
Triticum.—Spikelet 1 at each notch of 
the rachis. Glume 2, placed right and 
left (not dorsal and ventral.) 
Spikelets pedicillate, 1-3-flowered, but only 
1 flower regularly developed. 
Spikelets dorsally compressed. 
Panicum.—Glume 3, the lowermost very 
small. Involucre 0. 
Setaria.—Glume 3, the lowermost small; 
bristly involucre below the spikelet. 
Spikelets laterally compressed. Glumee 8. 
The two inferior florets rudimentary, ter- 
minal floret only developed. 
