1808 OLIII. OEAMINEJ!. 



Sebies a. VAnloaLO^tef-^Spifcelm articulate on thdi pedicels, or diciduotts- with thein, 1 

 to 2-ilawered, upper flower fclmie, (if 2) fruiting. 



[Spikelets on their pedicels in. a few geuei'a.) 



I. Khachis of inflorescence articulate or sub-articulate in Stenolaphrum. Flower glumes 

 usually coriaceous or herbaceous. 



Tmbb I. ^anieeae,— Spikelets 2-floicered, upper Uower'lisexual, lower male or neutir, rarely 

 both fertile fSpinifex is dioecious). 



* Spikelets articulate on their pedicels, c.veept in Isachne and Arundinella. 



f Spikelets not involucellate bysbristles. 



§ Spikelets not awned (2nd and 3rd glumes beaked or awiied in Panioum crus-galli) see also 

 Tricholtena and Arunjlinella), 



Spikelets dorsally flattened, ba,Be not thickened ; glumes 3 1. Paspaluji. 



Spikeleta with a callous, anriulus or -cup at the base 2. EiiioonLOA. 



Spikelets sub-globose, paniculate ; glomes 4, 1st and 2ijd separately 

 deciduous, subequal . 3. Isaoiine. 



Spikelets paniculate or spicate; glumes 4, 1st and 2nd very rarely sub- 

 equal, 2nd and 3rd awned in P. crus-galli, 4th rarely veiy shortly awned 4. Pamcum. 



Spikelets, of Panicum, but the 4th glume narrowed into a short flatteticd 

 stipes, or with 2 appendages near the base 5. Ichnanxhus. 



Spikelets paniculate, branches of panicle produced beyond the uppermost 

 spikelet; lot glum« minute hyaline ' 4 >| ■• • ••!•■■ • • • ■ ■ 6. CiiaM/ERAPHIs. 



Dioocious, spikelets in dense beads ........'.....,. 7, SpiNirEX. 



§1 SinheUts ammd, emcept in some species of Triohotona mid Arundinella. 

 Spikelets. of Panicum, but the nerves of the 2nd glume broadly fimbriate 



and the palea of 3,rd deeply qleft, 4th awned ...,.,.... 8. Axokopus. 

 Spikelets silky ; 1st glume wanting or minute and distant from the 3nd 



and 3rd with usually capillary awns 9. *TBiOHOLa;NA. 



Spikelets solitary or faSciciulate on a simple rhaohis or the brainohes of a 



panicle; 1st ^ume long awned ; . . i. . . 10. Opmsmenus. 



Spikelets persistent on the pedicels or the 1st and 2nd glumes separately 



deciduous, 4th deciduous ; usually awned, awn bent 11. AacNopjELrjA. 



tt Spikelets eftch siirrounded by an involucre of bristles . 12. Seiaria, 



** Spikelets persistent on their pedicels, at least the fertile, or deeidtwus with their pedicels. 

 f Spiltelets ii^ involucriite deciduous fascieles. 



Involucres- of numevous simple or plumose bristles completely surround- 

 ing the .spikelet i i. . . 13 Pbnsjsetdb. 



InvolMBres of 3 or 4 unilaterally divided branches ngt completely sarrounding 

 the spikelet 14, PLAaioSEiDU. 



Involucre of several outer bristles and inner flat lobes completely eur- 

 rounding 1 to 3 spikelets and at length hardened ;.....,., '15. CBNCHBrs. 



Spikes of few spikelets enclosed at the base in sheatbing bracts . ; . . 16. Xbrochloa. 



ft Spikelets not involucrate. 



Spikelets 2-seriate on a flat sub-articulate rhachis . 17.'*Stenotaphedii. 



Spikelets (at least the fertile) l-s6riate on an inElrticulate flat rhachis, the 

 upper ones nialB, lower female 18. Thtiabea, 



Tribe II. OryzeaB.— Spjftckis 1-flowered, articulate on their pedicels and deciduous from 

 them: Palea 1 to Snerved. Stamens 6 or fewer. 



Spikelets 2-«exual, awned or not; glumes 4, Ist and 2nd minute or 



solaoeous . •. ig Orissa. 



Spikelets 2-soxual, awnless, glumes 2, broad, thin ,....,. . . 20. Lkbbsia. 

 Spikelets 1-sexual, fruiting glume inflated, leaves broad '...... . 21, Lepiasp'is. 



Tribe IH. %oy»iem.— Spikelets 1-flowered, deciduous with thin pedicels, 2-Hxual or some 

 imperfect. 



* Spikelets fasciculate. 



Spikes solitary ; fa,sciole3 on all sides ; 3rd glumes echinate 22. Tmsci. 



Spikes dense, spikelets not a^ylled ; glumes 4, the outer one the largest . . 23. Netoaohkb. 



** Spikelets solitary; rartly 2-nate. 

 Spike^yiery^^deri spikelets narrow;. Itt and Snd awned' ..... . 24. Pbsotis 



Spike rigid i spikelets appressed lo the rhaohis, not awned . 25. Zotsia. 



