178 A TEXT-BOOK OF GRASSES 



FF. Fruit elliptic; pubescence short or 

 none. 

 G. Inflorescence of slender racemes, 

 more or less digitately ar- 

 ranged Syntherisma ' 



(Par. 216). ! 



GG. Inflorescence a capillary panicle.. Leptolom a. - i 



DD. Fruit indurated, rigid (or if thin, not j 



hyahne-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-Uke callus below the 

 spikelet. 

 G. First glume present; racemes 



racemose along the main axis . . Brachiaria. 

 GG. 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, 



rare Reimarochloa. 



FF. Fruit not long-acuminate, indurated. 

 G. First glume typically wanting; 



spikelets plano-convex, subses- * 



sile in spike-like racemes Paspalum |^ 



GG. First glume present; spikelets (Par. 214). 1 



usually in panicles. * 



H. Glumes and lemmas unawned. V 



I. Second glume inflated-sac- # 



cate, this and the sterile 



lemma much exceeding the i> 



stipitate fruit Sacciolepis. 



II. Second glume not inflated- 

 saccate. 

 J. Culms (in our species) 

 woody; fruit with a tuft 

 of down at apex. Florida.LASiAcis. 



