222 A TEXT-BOOK OF GRASSES 
JJ. Spikelets compressed. 
K. Spikelets 2-flowered; ra- 
chilla articulate ......... CATABROSA. 
KK. Spikelets 3- to many- 
flowered; rachilla usually 
continuous, the  palea 
persistent after the fall 
of the lemma........... ERAGROSTIS 
HH. Lemmas 5- to several-nerved. (Par. 248). 
1. Lemmas flabellate, many- 
nerved; spikelets in close 
spike-like panicles; annual. 
AIPORT: «oi pierce Os dye aie 2's ANTHOCHLOA. 
11. Lemmas not flabellate. 
J. Spikelets in 1-sided fascicles, 
these in a panicle, the 
branches spreading in 
anthesis, appressed at 
THAPUTIOY s/c oe oe es os» ire oe Ae 
js. Spikelets not in 1-sided (Par. 250). 
fascicles. 
K. Palea wing-margined or 
appendaged on the keels; 
spikelets long and slender, 
in racemes. California.. .PLEUROPOGON. 
KK. Palea not wing-margined 
nor appendaged. 
L. Callus bearded (base of 
lemma cobwebby in 
species of Poa) spikelets 
2- to 4-flowered. 
M. Rachilla_ pilose, pro- 
longed above the upper 
floret; lemma with a 
short awn just below 
GEE Cte cee pe Ge GRAPHE- 
mM. Rachilla naked, not [PHORUM. 
prolonged ; lemma awn- 
less but 1 or more of 
the nerves projecting 
beyond the apex...... ScoLOcHLOA. 
LL. Callus not bearded. 
M. Spikelets as broad as 
long, somewhat heart- 
shaped; lemmas broad, 
closely imbricated, 
horizontally spreading. BRIzA. 
MM. Spikelets longer than 
broad. 
