AGROSTIDEZ 197 
c. Spikelets in pairs in a spike-like panicle; 
one perfect, the other staminate or neu- 
tral, the pair deciduous together....... Lycurus. 
cc. Spikelets all alike. 
D. Rachilla prolonged behind the palea as 
a pedicel; glumes very short; inflo- 
rescence a narrow few-flowered panicle. BRACHYELY- 
pp. Rachilla not prolonged. [TRUM. 
E. Lemma awnless; fruit short, ovoid; 
inflorescence an open panicle... Miro. 
EE. Lemma awned or mucronate. 
F. Awn slender, straight or flexuous, 
not twisted nor bent; spikelets 
small; glumes shorter than the 
PER, Ee ee nd ee oe MUHLEN- 
FF. Awn usually stout, bent or twisted. [BERGIA. 
c. Awn stout, twisted and bent, (Par. 231). 
persistent; callus pointed, long; 
Iemana- narvow... 2.4 V4. tee ne STIPA 
cc. Awn bent but not twisted, de- (Par. 230). 
ciduous; callus short; obtuse; 
lemma broad, elliptical or 
GUE C eco sts wcn Oe ae ae ORYZOPSIS. 
AA. “ae not indurated at maturity, mem- 
branaceous or hyaline, like the glumes or 
more delicate. 
B. Glumes none; low annual. Oregon and 
ARNE DE 0 88 en the cee ome ate b ScHMIDTIA. 
BB. Glumes present. 
c. Glumes falling with the spikelet, some- 
times with a portion of the pedicel or 
branchlet, the articulation being below 
the glumes (compare Cinna). 
p. Glumes long-awned................... POLYPOGON. 
pp. Glumes awnless. 
E. Inflorescence a dense spike-like pan- 
icle; lemma awned from the lower 
part of the back.. ae . ALOPECURUS 
EE. Inflorescence a narrow loose panicle; (Par. 233). 
lemma awned from the bifid apex. LIMNODEA. 
cc. Glumes persistent, not articulated on the 
pedicel. 
p. Glumes longer than the lemma. 
E. Glumes plumose; an annual with 
woolly ovoid heads............... LAGURUS 
EE. Glumes not plumose. (Par. 237). 
F. Inflorescence a dense cylindrical 
spike-like panicle; glumes com- 
pressed-carinate, ciliate on the (Par. 232). 
keels; lemma awnless........... PHLEUM 
