178 A TEXT-BOOK OF GRASSES 
‘FF. Fruit elliptic; pubescence short or 
none. 
G. Inflorescence of slender racemes, 
more or less digitately ar- 
PHOS ES omega Oe eae oe SYNTHERISMA 
(Par. 216). 
aa. Inflorescence a capillary panicle..LEPTOLOMA. 
pp. Fruit indurated, rigid (or if thin, not 
hyaline-margined). 
E. Spikelets (or the primary one of a 
pair) placed with the back of the 
fruit turned away from the rachis, 
usually solitary (not in pairs). 
F. First glume and the rachilla joint 
forming a swollen ring-like callus 
below the spikelet.............. ERIOCHLOA. 
FF, First glume present or wanting but 
no ring-like callus below the 
spikelet. 
Gc. First glume present; racemes 
racemose along the main axis... BRACHIARIA. 
ac. First glume wanting; racemes 
digitate or subdigitate......... AXONOPUS 
EE. Spikelets placed with the back of the (Par. 215). 
fruit turned toward the rachis of 
of the spike-like racemes, or pedicel- 
late in panicles. 
F. Fruit long-acuminate, scarcely in- 
durated; both glumes wanting; 
spikelets sessile, solitary in spike- 
like racemes, these reflexed or 
verticillate at maturity. Florida, 
Coc SO ae eae y SMI 8s RRP) ela REIMAROCHLOA. 
FF. Fruit not long-acuminate, indurated. 
c. First glume typically wanting; 
spikelets plano-convex, subses- 
sile in spike-like racemes...... PASPALUM 
aq. First glume present; spikelets (Par. 214). 
usually in panicles. 
H. Glumes and lemmas unawned. 
1.Second glume _ inflated-sac- 
cate, this and the sterile 
lemma much exceeding the 
stipitate fruit...........- SACCIOLEPIS. 
11. Second glume not inflated- 
saccate. 
J. Culms (in our. species) 
woody; fruit with a tuft 
of down at apex. Florida.Lastracis. 
