CHAPTER XXII 
TripBE X. CHLORIDE 
A MODERATELY large tribe of about 30 genera, mostly 
of warm regions. It can be recognized by its 1-sided spikes 
or spike-like racemes, the spikelets borne in 2 rows on 
one side of a continuous rachis. Spikelets 1- to many- 
flowered, usually articulated above the glumes. The 
spike is reduced to 2 or 3 spikelets or even to 1 spikelet 
in some species of Bouteloua and allied genera. In the 
dicecious genus Bulbilis the pistillate spikelets are in a 
small cluster among the leaves, but the staminate inflo- 
rescence is characteristic of the tribe. Some species of 
Leptochloa approach the tribe Festucez, the spikes not 
being strictly 1-sided. In some species of Bouteloua the 
small spikes are deciduous from the main axis, thus resem- 
bling Naziez. 
KEY TO THE GENERA OF CHLORIDEX 
A. Plants dicecious or monecious; low stolo- 
SET WTT DETER oo si. bowen Eee ce BULBILIS 
AA. Plants with perfect flowers. (Par. 245). 
B. Spikelets with more than 1 perfect floret. 
c. Spikes solitary, the spikelets distant, ap- 
pressed, several-flowered; a low per- 
Pee shin Dorey ae pares Wee iL war MEO TRIPOGON. 
cc. Spikes more than 1 (exceptionally 1 in 
Eleusine). 
Dp. Spikes numerous, slender, along an 
RAGE CENIG ds os ete tok LEPTOCHLOA. 
DD. Spikes few, digitate or nearly so; annual 
weeds. 
E. Rachis of spike extending beyond the [TENIUM. 
WUBICRBB ENS do octal ais WS ais be MRO DacTYLoc- 
