190 
Pennisetum. 
Much branched, glabrous annual; bristles not plumose 
Panicum. 
a. Lower branches of the panicle whorled, upper 
ones scattered. 
Spikelets silky hairy, in pairs along one side of the 
branches. 
Uppermost glume 5- to 7-veined; one 14 to 
2 lines long 
Upper glume 3- vende apace 1 6 14 titles 
Spikelets glabrous, scattered; uppermost glume 5- to 
7-veined; ligule very prominent, not ciliate 
6. Lower branches of the panicle clustered, 
upper ones scattered. 
Lowest glume acute, half as long as the spikelet. 
Nodes prominently ciliated, leaves hairy ... 
Nodes and leaves glabrous, ligule very short 
Lowest glume truncate, very short. Tall, glabrous; 
ligule very short, ciliate Ei ae se 
c. Branches of the panicle scattered, spreading 
(also P. distachyum and P. reversum ). 
Branches ending in awn-like points; spikelets distant ... 
Spikelets sessile, crowded. 
Spikelets intermixed with bristles ; wppermost glume 
often awned ; fruiting glume smooth a's 
Fruiting glume rugose, tipped with a minute point 
Spikelets stalked; fruiting glume smooth, stalked. 
Much branched, beset with long hairs 
d. Panicle spike-like, simple or of a few erect 
branches. 
Spikelets beset with long silky hairs; flowering glume 
smooth. 
Spikelets rather acute; innermost glume 5-nerved 
Spikelets truncate; innermost glume nerveless 
Spikelets close together in 2 rows. 
Spikelets glabrous; flowering glume acute wrinkled 
Spikelets somewhat hairy ; flowering glume obtuse, 
with an awn-like point ; leaves hairy. 
Innermost glume 5-nerved, gaa glume 
minutely rugose 
Innermost glume 3- to 5- iietedl neiaite on the 
margin 
FLORA OF SOUTH AUSTRALIA. 
refractum 
coenicolum 
divaricatissimum 
prolutum 
effusum 
Mitchelli 
decompositum 
spinescens 
Crus-galli 
adspersum 
paucifiorum 
leucophaeum 
argenteum 
gracile 
helopus 
Gilesii 
