CHAPTER XXII 



Tribe X. CHLORIDEiE 



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 

 dioecious 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 Festucese, the spikes not 

 being strictly 1-sided. In some species of Bouteloua the 

 small spikes are deciduous from the main axis, thus resem- 

 bling Nazieae. 



Key to the Genera of Chlorides 



A. Plants dicEcious or monoecious; low stolo- 



niferous perennials Bulbilis 



AA. Plants with perfect flowers. (Par. 245). 

 B. Spikelets with more than 1 perfect floret, 

 c. Spikes sohtary, the spikelets distant, ap- 

 pressed, several-flowered; a low per- 

 ennial Tripogon. 



cc. Spikes more than 1 (exceptionally 1 in 

 Eleusine). 

 D. Spikes numerous, slender, along an 



elongated axis Leptochloa. 



DD. Spikes few, digitate or nearly so; annual 

 weeds. 

 E. Rachis of spike extending beyond the [tenium. 



spikelets Dactyloc- 



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