177 
GENERA OF GRASSES OF THE UNITED STATES. 
this sometimes bearing a rudimentary lemma; glumes narrow, acumi- 
nate, 1-nerved, about equal, shorter than the floret; lemma strongly 
E>, 
(ZTE P= 
CZ 
LZ 
LO 
LEZ 
L421 
SS 
SS 
= 
\ 
ZY yy 
it ted 
NSS 
\\ 
N 
(GAZE 
== 
Plant, * 4; spikelet, floret, 
5. 
Fic. 104.—Crowfoot grass, Dactyloctenium aegyptium. 
and seed (without pericarp), 
compressed, pubescent on the keel, firm in texture, 3-nerved, the 
lateral nerves close to the margins. 
12 
97769°—19—Bull. 772 
