128 
W. C. Etheridge 
green and glaucous at period of full heading, partly covering the internode; 
leaves colored as sheaths, narrow, margins glabrous or sparsely ciliate; 
panicles short, 
sparsely branched 
and fruited, the 
branches stiff and 
ascending ; spike- 
lets 2-3-grained ; 
glumes dark green 
and somewhat 
glaucous at period 
of full heading, 
unusually long 
(28-34 mm.), usu- 
ally 9-nerved, 
sometimes 8- 
nerved ; grains 
black, elongate, 
outer grains re- 
markably long 
(20-25 mm.), 
long-p o in ted; 
lemma glabrous, 
usually 7-nerved; 
awn usually pres- 
ent on both the 
outer and the in- 
ner grain, scarce- 
1 y twisted; 
basal hairs always 
present, numer- 
ous, bushy, long 
(3-6 mm.); basi- 
lar articulation of 
the outer grain 
\ ( ry marked; rhachilla of the outer grain short (2-2.5 mm.), strong, gla- 
brous, persistent to the second grain. Plants 7-9 dm. tall; late in maturing. 
Fig. 22. 
PANICLE OF AVENA STERILIS (CULTIVATED) 
Sterilis Selection, Red 
(Panicle representing the varieties Arena sterili.s nir/ra 
Rustproof, Burt, and King) 
