ANDROPOGONEZ 167 
coarse grass with broad blades and a large woolly plume- 
like panicle as much as 2 feet long. The unawned spike- 
lets are similar to those of the preceding genus, but the 
axis of the racemes is articu- 
lated. The native country of is 
sugar-cane is not known, but it 
is now cultivated in all tropical 
countries. Although it produces 
seed occasionally it is propa- 
gated by cuttings of the stem. 
206. Erianthus Michx.—The 
inflorescence resembles that of 
the preceding genus, but the 
spikelets are awned. One species 
(E. Ravenne Beauv.), a native 
of the Mediterranean region, is 
cultivated for ornament under 
the name of plume-grass, wool- 
grass, Ravenna-grass, or hardy 
pampas-grass. It is atall peren- _ Fie. 14. Saccharum officinarum. 
nial with narrow blades and a i eee pei as apinies eas 
; E a flower (c), X3. (U.S. Dept. Agr., 
plume-like panicle, as much as 2_ Div. Agrost., Bull. 20.) 
feet long. 
SusTrRinE EUANDROPOGONEA 
207. Spikelets not all alike, the sessile one of each pair 
fertile, the pedicelled sterile, sometimes reduced to the 
pedicel. The genera described below are included by 
some authors as sub-genera of the large genus Andro- 
pogon. The axis of the raceme is articulated. The 
awn is very large and strong in some genera (Hetero- 
pogon, Chrysopogon), is geniculate and twisted, and 
bears at the base of the spikelet a strong sharp hairy 
