CXIII. GRAM1NEJE 
573 
Sub-tribe 2. Phleoideae. Panicle spike-like, dense, cylindrical 
or subglobose. Flowering glume awnless or 1-3-awned, 
loosely enclosing the grain in fruit. Rhachilla sometimes 
produced. 
Sub-tribe 3. Sporobolese. Panicle loose or reduced to a simple 
raceme. Flowering glume awnless. Grain with more or 
less open glumes. Rhachilla not produced beyond the 
flower. 
Sub-tribe 4. Euagrosteae. Panicle various, usually loose. 
Flowering glume usually furnished with a dorsal awn. 
Grain loosely included in the glumes. 
Tribe VI. Aveneae. Spikelets 2- or rarely many-flowered, 
mostly paniculate. Flowering glume furnished with a dorsal 
or terminal awn or in the equally 2-flowered genera awn- 
less. Rhachilla often produced above the flowers. 
Tribe VII. Chlorideae. Spikelets 1- to many-flowered, arranged 
in two sessile rows along one side of the rhachis. 
Tribe VIII. Festuceae. Spikelets 2- to many-flowered, variously 
panicled, rarely racemose. Flowering glume awnless or fur- 
nished with one or more, sometimes numerous, terminal awns. 
Tribe IX. Hordeae. Spikelets 1- to many -flowered, sessile in 
the hollows of the rhachis of simple spikes. 
Tribe X. Bambuseae. Shrubby or arboreous. Leaves flat, 
almost always jointed to the sheath. Spikelets 1- to many- 
flowered. Lodicules often 3. Stamens usually exceeding 3. 
Key to the Genera. 
SERIES A. PANICACEaE. Spikelets 1- or 2-flowered ; if 2- 
flowered the upper flower only fertile, the lower male or rudimen- 
tary, except in Isachne, where both are sometimes fertile ; stalk 
of spikelet jointed below the empty glumes, except in Isachne 
and Arundinella (see also Pennisetum ), the joint often not obvious, 
except in the fruiting spikelet. 
Tribe I. Paniceae. Spikelets usually 2-flowered ; terminal 
flower 2-sexual, fertile ; lower male or rudimentary, rarely both 
fertile ; in Paspalum, the lowest glume wanting or minute. 
Spikelets awnless, except in Panicum Crus-galli, and not surrounded by an 
involucre of bristles. 
Spikelets orowded on the straight, spike-like branches of 
the panicle. 
Lower empty glume minute or wanting. Lower flower- 
ing glume empty or sometimes containing a rudi- 
mentary flower . . . . . . .1. Paspalum. 
