CHAPTER XXIII 
Trips XI. FESTUCEA: 
A LARGE tribe of about 80 genera, mainly inhabitants 
of the cooler regions. Spikelets more than 1-flowered, 
usually several-flowered; inflorescence an open, narrow 
or sometimes spike-like panicle. If the lemmas are awned, 
the awn is straight and terminal or rarely from between 
the teeth of a bifid apex (some species of Bromus and a few 
species of Festuca). The lemma is divided into several 
awns at the summit in Pappophorum and Cottea and a 
few other genera. In some species of Eragrostis the palea 
is persistent on the inarticulate rachilla. In most of the 
genera the spikelet breaks up at maturity, each floret 
falling with a joint of the rachilla, the glumes being 
persistent on the pedicel. Scleropogon, Monanthochloé, 
Distichlis and a few species of Poa are dicecious. The 
blades are broad and petioled in a few tropical genera. 
Gynerium, Cortaderia, Arundo and Phragmites are 
tall reeds. 
Key To THE GENERA OF FESTUCEZ 
A. Lemmas divided at summit into 3 to several 
awns or awn-like lobes (only the pistillate in 
Scleropogon; lemmas more or less 3-toothed 
in Tridens of the next division). 
B. Awns 9 or more. 
c. Divisions of lemma awn-like, plumose; 
panicle spike-like. Arizona.............PAPPOPHORUM. 
cc. Divisions membranaceous, awn-pointed; 
panicle open. Texas to Arizona........COTTEA. 
BB. Awns less than 9. 
(219) 
