March 1,, 1930. J Revision of the Flora of the Bombay Presidency 



18 



b. Spikelets slender awned (vol. 32, 635). 44. Alloteropsis. 



ii. Inflorescence usually different (but see 



Axonopus and Paspalum) ; fruiting 



floral glume with more or less inrolled 



margins, usually crustaceous and 



straw-coloured or whitish ; pale of 



the barren floret, if developed, not 



attached to the false fruit (Genera 



45-60). 



a. Spikelet falling entire and singly from 



the persistent pedicels (Genera 45- 



58). 



(1) Group Panicastrce .-—Spikelets not awned, or 



if awned, then sub-sessile in false second 



variously arranged spikes and with the 



awns from the entire tips of the upper 



involucral glume and lower floral glume 



(Echinochloa sp.) or from the tips of both 



involucral glumes or at least the lower 



(Genera 45-<S7). 



i. Inflorescence of variously arranged (rarely 



solitary) simple or compound, usually 



second, spike-like, dense (rarely loose) 



racemes, not an open or contracted and 



cylindric panicle ; spikelets usually 



paired or sometimes particularly towards 



the base of the raceme in fascicles of 3 



(rarely more) unequally pedicelled or 



solitary, alternately to the right and the 



left of the median line of a usually 



dorsiventral rhachis ; fruit dorsal ly (very 



rarely laterally) compressed, its glume 



and pale crustaceous ; racemes usually 



rather dense (Genera 45-52). 



(a) Back of fruit abaxial (Genera 45-47). 



a. Spikelets strongly laterally com- 



pressed, distant on long slender 

 rhachises ; lower involucral glume 

 herbaceous, as long as the spikelet 

 (vol. 33, 7) .. 



b. Spikelets more or less dorsally com- 



pressed ; lower involucral glume 

 never herbaceous. 

 (i) Lower involucral glume rudimentary 

 with a swollen annular callus at 

 the base of the rhachilla ; fruit 

 mucronate (vol. 32, 636) 

 (ii) No swollen annular callus at the 

 base of the spikelet. Lower in- 

 volucral glume present ; racemes 

 racemosely arranged (vol. 32, 636). 47. Brachiaria 

 (6) Back of the fruit adaxial (Genera48-52). 



a. Lower involucral glume typically 



absent ; spikelets usually con- 

 spicuously planoconvex, with the 

 flat side turned away from the 

 rhachis (vol. 32, 639) ... 



b. Lower glumes developed ; rhachis 



persisting, not articulate ; spikelets 



falling from the pedicels (Genera 



49-52). 

 (i) Involucral glumes neither awned nor 

 caudate ; if shortly cuspidate- 

 acuminate, then the fruiting floral 

 valve obtuse with an imposed 



[7] 



45. Pseudechinolana. 



46. Eriochloa. 



!. Paspalum. 



