bo 
@ 
bo 
io 2) 
3 
8 
= $ 
vo 
pe 
= 
thee 
r Keele of the palea not winged 
or awnless 
. Rachilla and callus naked or nearly so 
115 
. Empty glumes obtuse, much shorter than the obtuse or im- 
perfectly 3-toothed flowering glumes. ..... 106. CATABROSA 
. Empty glumes acute, nearly equaling or as long as the acute, 
05 
or very short-awned flowering glumes ...... 105. Ka:terta 
. Spikelets nearly sessile in dense one-sided clusters at the ends 
of the few panicle branches; flowering glumes strongly com- 
acteiga keeled, the keel extending into a ee point or 
. Dacryus 
: Spikelets not in dense one-sided clusters at ts pe of the 
pani 30 
icle branches 
Keels of the palea with a distinct crest or wing-like append- 
age; flowering glume 7-nerved, the mid-nerve elec pro- 
pao beyond the entire or emarginate gir inflorescence 
110. pliomicé 
31 
: notte somewhat heart-shaped; flowering glumes cordate 
the b 
ase, many-nerved, strongly rounded on the back, 
nee ventricose. (Bromus brizeformis may be looked 
for her 113. Briza 
. Spikelets not Rel ak cal: flowering glumes not cordate at 
base 32 
. Flowering glumes very broad, fan-shaped (flabelliform) , thin- 
membranaceous, obscurely few- to eae ad spikelets 
crowded in short, spike-like panicles.... 108. ANTHOCHLOA 
. Flowering glumes not broad fan-shaped 
- Callus barbate or pilose. (Some species of Poa may be cae 
for here eeee 
Callus naked ‘s 
Rachilla and callus both pilose-hairy, h 
airs 1-2 mm. long; 
second glume acute, nearly as long as the goats flowering 
glume, with a very short awn just below the bidentate apex 
121. GRAPHEPHORUM 
35 
. Nerves of the flowering glumes 5-9, manifest 36 
Nerves of the flowering glumes 3-5, indistinct or obsolete... 37 
ve low, slender grass with strict, few-flowered panicles, 2-4 em. 
long; flowering glumes pilose on the margins, smooth and 
rounded on the back, subcoriaceous, tridentate at the rather 
broad apex 98. SIEGLINGIA 
pe 
36. A tall, stout grass 9-15 dm. high, with ample, open panicles 
16-30 em. long; flowering glumes glabrous on the margins, 
apex erose 120. ScoLocHLoa 
