139. GRAMINE.E. 



Group 9. Oryzese. Rice, etc. 



A. Gls. i and ii minute or setaceous, iii cliartaceous, 



strongly 3 -5-nerved 33. Oryza. 



B. Glumes i and ii absent: — 



Gls. iii and iv broad thin. Awnless . . . .31. Leersla. 

 Gl.s. iii and iv narrow thin. Awued . . . . 35. JIi/gro?'hiza. 

 Group 10. Panicastrse. 



I. Infloi'escence an open, contracted cylindric or .spici- 

 form panicle: — 



A. Spikelets, or at least the upper on each branchlet 



subtended by 1-more bristles iO. Setaria. 



B. Spikelets not subtended by bristles :— 



1. Spkts. usually somewhat oibbovis, in spiciform 



panicles, tlie branches of which are more or 

 less adnate to the axis (so that the pedicels 

 appear to spring more or less directlj' from the 

 axis) ......... 41. Saeciolepis, 



2. Branches of panicle not adnate to the main 



axis : — 

 Panicle much contracted, dense, veiy compound 

 with erect nari'owly lanceolate spkts. Gl. iii 

 tapering into a beak ; iv rather thin . . . -12. Hymenachne. 

 Panicle usually open. Gl. iii not beaked, iv crus- 



taceous ......... 43. Fanicum. 



II. Inflorescence of variously arranged usually' secund 

 spikes. Spkts. mostly paired, unequally pedicelled, 

 or solitai'y and alternately to right and left of the 

 median line of a dorsiventral rhachis :— 



A. Glumes caudate, awned or cuspidate acuminate : — 

 Gls. cuspidate or awned from the entire tip. Gl. i 



not awned 44. Echlnochloa. 



Gls. awned from slightly notched tip. Gl. i long- 

 awned 45. Oplismenus, 



B. Glumes neither awned nor caudate, if cuspidate 



then abruptly so from the rounded or obtuse gl. 

 iv, and margins of iv inrolled all along : — 



1. Gl. i, if present abaxial, back of fruit adaxial* : — 

 a. Gl. i absent or reduced to a minute scale. 



Spkts. conspicuously plano-convex . . 46. Paspalum. 

 h. Glume i often small but distinctly developed : — 

 Spkts. solitary, closely 2-seriate, laterally con- 



tiguoixs in rigid spikes. Gl. iv acute in fruit 47. Pafpalidium. 

 Spkts. solitary or paired, when solitary dor- 

 sally contiguous, in often flexuous spikes. 

 Gl. iv obtuse or rounded and cuspidate in frt. 48. Urochloa. 



2. Gl. i, if present, adaxial. Back of fruit abaxial: — 



Gl. i small. Gl.iv acute. Spikes usually racemed 49. Brachiaria, 

 Gl. i rudimentary, forming with base of rhachilla 



a knob-like callus 50. Eriochloa. 



Group 11. Digitariastrae. 



Spkts. awnless. Gl. i minute rarely 0; iii usually with 



.5-7 clo.se straight prominent nerves 51. Digitaria. 



Spkts. awned. Gl. iii more or less hardened and like iv . 52. Allotaropsis. 

 Group 12. Saccharastrae. Sugar-cane, etc. 



Rhachis of racemes tough, racemes in dense thyrsoid 



solitary villous i)anicles. All spkts. pedicelled, awnless 54. Imperata. 

 Rhachis of racemes readily disarticulating. Panicles 

 thyrsoid or with distinct whorls of branches. Si)kts. 

 sessile and pedicelled, often awned 5o. Saccharum. 



* Where gl. i is adaxial, i.e. the nearest of all the glumes to the rhachis, it 

 follows that the back of the fruit will be turned away from the rhachis or abaxial, 

 and vice versa. Thus in PaKpalHin the flat side is outwards or turned away from 

 the rhachis, the Imck is convex and faces the rhachis. 



944 



