O Spikelets jointcd below the glumes, falling cntire, a sterile 
| cas below the fertile one (see also Sphenopholis and 
a 
4 Glumes membrenaceous, the fertile lemma indurate, 
\ Alopecurus) 
e awnless VII. Panicesae 
9, Glumes coriaceous, the fertile lemma thin and 
G hyaline, avmed VIII, Andropogonese 
Key to the Genera, 
I. Festuceae, 
O Lemmas awnless 
~ Lemmas d-nerved 
4 Rachilla glabrous; panicle not plumelike o,. bragrostis 
4 Rachilla long silky; panicle plumelike 8. Phragmites 
*& Lemmas S-many nerved 
4 Culms bulbous at the base; sheaths closed 9. Melica 
4 Culms not bulbous at the base 
¢ Spikelets crowded in dense glomerules at 
/Q the ends of panicle branches 6. Dactylis 
4 Spikelets usually not dense, eventy?7 
fo evenly distributed throughout the panicles 
@& Lemmas rounded on the back, the nerves 
‘2 parallel de Glyceria 
“| Lemmas keeled, the nerves converging 
‘2. toward the sumnit 4-6 Poa 
© Lemmas avmed (avmless in “estuca clatior and -romus brizaeformis ) 
& Lemmas entire, awned from the tip 
4 Svikelets all fertile, nanicles onen 2e Yestuca 
q Spikelets sterile and fertile intermixed; 
1 SJ 
& panicle spikelike 7e Cyanosurus 
~ Lemmas minutely bifid, avmed from betvreen the teeth 1. Sromus 
