97 
TripE X.—CHLORIDEZ. 
Spikelets . pee ioahdonee flowered in 1-sided spikes or racemes; 
he fasiculate, rarely solitary; flowering glumes 
usually keeled, entire and unawned, or toothed, and with 1 or 3 
(rarely more than 3) straight awns. 
A small tribe of 27 genera and 155 species, charac- 
terized chiefly by the inflorescence, which is nearly that 
of Paspalum. The awns when present, are not dorsal 
or twisted, as in the Agrostidew and Avene. Chiefly 
natives of tropical and subtropical countries; a few are 
widely distributed as weeds throughout the warmer 
parts of the world. A number are good Epa 
grasses and are valued for grazing purposes. One o 
these is the shes: buffalo-grass of the ies 
plains, which is remarkable for “having the staminate 
and pistillate garner — and in unlike inflores- 
cences, either u same plant (moncecious) or 
upon different shat nee Bermuda-grass, and 
the Gramas of the South West belong to this tribe. 
KEY TO THE GENERA OF THE CHLORIDEX. 
iol 
. Spikelets unisexual, dissimilar, the staminate and pistillate 
spikelets on the same, or on separate plants.. 85. BuLsriis 
1. Spikelets all alike, } phrodit 
2. Spike solitary; second empty oa with a stout, divergent 
yn on the back near the middle 75. CAMPULOSUS 
2. Spikes rarely solitary; empty glumes not awned on back... 3 
3. w somites articulated with the pedicels below the a 
lum 
gtum 
3. spikelets not articulated with the pedicels; empty glumes — 
5 
4. Spikelets strongly compressed; empty glumes — keeled. 
. SPARTINA 
4. Spikelets not much flattened; empty glumes oe inflated 
and rounded on the back 81. BrecKMANNIA 
pa) 
: gamers strictly Petpet: —— any S phetuai« of the 
ce 
poreras 2- to ceveral-fowere or with an awned, or iacat 
prolongation of the rachil 
15444—No. oo 
oh 
