9 
very thin and hyaline, often bearing a twisted and bent awn. A palea to 
each flower, sometimes very small or deficient in the fertile flower. Stamens 
three, rarely fewer. 
(The awn when present is terminal or between the notches of the flower- 
ing glume in all except Arthraxon.) 
Subtribe I .—Zoysiexe.—Spikelets solitary or rarely in clusters of two or 
three, inserted all round the articulate rhachis of a simple spike or raceme. 
Awns none on the flowering glume, none or straight on the outer ones. 
Spikelets sessile in notches of the rhachis and closely 
appressed. 
Glumes two, smooth... os ves ... 14, Zoysia. 
Spikelets two, rarely three or four together on very 
short pedicels. 
Glumes usually three, the larger one 
echinate, a minute outer one sometimes 
wanting and a small a flowering 
one i o ... 15. Lappago. 
Spikelets in a dense spike, nee ema Glumes four, 
the outer one the largest... a ... 16. Neurachne. 
Spikelets in a loose spike or raceme, very narrow. 
Glumes three, the two outer ones with 
straight awns ... S43 17. Perotis. 
Subtribe II.—Rottboelliee. Sa pikealets si ATSRf in pairs or rarely 
solitary, in alternate notches of the articulate rhachis of a simple spike, one 
sessile fertile and more or less embedded in a cavity of the rhachis, the other 
pedicellate. 
Spike one-sided, the rhachis scarcely articulate. 
Pedicel-like spikelet barren ae ... 19. Hemarthria, 
Subtribe [V.—Euandropogonez.—Spikelets in pairs or threes, rarely 
solitary, one sessile and fertile and one or two pedicellate and male neuter or 
rudimentary, rarely fertile or deficient. Flowering glume of the fertile 
spikelet usually awned or reduced to the awn. 
(The awn is deficient in Imperata, in Ischemum pectinatum, and some- 
times minute or deficient in some varieties of other species.) 
Spikelets in pairs along one side of a simple spike 
or of the spike-like branches of a simple 
panicle. 
Spike single. Spikelets unisexual, the awned 
females turned to one side, the awnless 
males imbricate behind them . ... 24, Heteropogon. 
Spikes single or digitate. Sessile spineiee with a 
male flower below the fertile one __... 25. Ischemum, 
Spikes digitate. Spikelets one-flowered with a 
barren pedicel in the same notch. Awn 
dorsal near the apex... . 27. Arthraxon. 
Spikes digitate. Spikelets in pairs, nae one- 
flowered and usually fertile ... ... 28. Pollinia. 
Spikes solitary digitate or several nearly sessile 
on a simple rhachis. Sessile spikelet 
one-flowered and fertile, pedicellate one 
male or neuter ... ae a ... 29. Andropogon. 
