306 
Plagiosetum in the Cenchrastrae, a genus already recognised as 
distinct in the Flora Australiensis, and therefore not included in 
the Key. Two species have been moved from Paspalum to 
Digitaria, viz. Paspalum brevifolium Fluegge to Digitaria longi- 
ora Pers. and Paspalum minutiflorum Benth. non Steud. to 
Digitaria recta Hughes, as the account of Digitaria would not 
have been complete had these two species been omitted. 
KEY TO THE GENERA. 
Fertile floret glabrous, smooth and. shining 
or rugose : 
*Fruiting valve cartilaginous indurated 
or crustaceous; inflorescence an open 
panicle or composed of simple or com- 
pound racemes : 
Fruiting valve with usually flat, thin 
scopic, scale-like valvule of the barren 
floret attached to its base : 
Inflorescence of digitate or sub- 
digitate (rarely solitary) racemes, 
these longer than the main axis : 
Spikelets, including the fertile 
valve, awned; racemes stout “ I. Alloteropsis. 
Spikelets awnless; racemes slender . Digi . 
Inflorescence an open panicle - II. Leptoloma, 
Fruiting valve with more or less inrolled 
margins, usually crustaceous; valvule of 
the barren floret, if de eveloped, not 
attached to the false fruit : 
Inflorescence of racemosely eneed 
simple or compound racemes 
Back of fruit abaxial - - IV. Brachiaria. 
Back of fruit adaxial : 
Rhachis of racemes persistent on 
the main axis; spikelets falling 
off singly : 
Glumes neither awned nor 
caudate, or if shortly cuspidate 
acuminate, then the fruiting 
valve obtuse with an imposed 
mucro and the margins in- 
rolled all along : 
Fruiting valve acute or 
tended by a bristle, or the 
racemes phen ending in a 
bristle 
