CLXXIII. GBAMINE.S:. (J. D. Hooker.) 3 



Spikelets panicled, branches of panicle produced beyond 



the uppermost spikelets; gl. I minute, hyaline . . 7. CHAMJERAPHIS. 



Dioecious, male spikelets in clustered spikes, fern, soli- 

 tary 8. SPIXIFEX. 



Bjjikeleti aivned, except in some sp. of Tricholcena 

 and Arundinella. 



Spikelets of Panicum, but nerves of gl. II broadly 



fhnbriate, and palea of III deeply cleft, IV awned 9. AXGNOPFS. 



Spikelets silky; gl. I 0, or minute and distant from II 



and III with usually capillary awns . . . .10. TEICHOL/ENA. 



Spikelets solitary or fascicled on a simple rachis or the 



brandies of a panicle ; gl. I long awned . . .11. OPLISMENUS. 



Spikelets persistent on the pedhels, or gls. I and II sepa- 

 rately deciduous, IV deciduous ; usually awned, awn 

 bent 12. ARTJXDINELLA. 



ft Spikelets each surrounded by an involucel of bristles . 13. SETARIA. 



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



their pedicels. 



f Spikelets in involucelled deciduous fascicles. 



Involucel of bristles 14. PEXNTPF.TTTM. 



Involucel of spines connate at the base . . . .15. CEXCIIRDS. 

 ft Spikelets not involucelled. 



Spikelets 2-seriate on a flat subarticulate rachis . . 16. STENOTAPHRUM. 



Spikelets (at least the fertile) 1-seriate on an inarticulate 

 flat rachis, the base of which dilates and encloses a 

 fruiting spikelet . . . . . . .17. THUABEA. 



Tribe II. ORYZEJ:. Spikelets 1-fld., articulate on their pedicels and 

 deciduous from them. Palea 1-3-nerved. Stamens 6 or fewer. 



Spikelets 2-sexual, awned or not ; gls. 4, I and II minute 



or setaceous 18. OflTZA. 



Spikelets 2-sexual, awnless ; gls. 2, broad, thin . . 39. LEEKSFA. 



Spikelets 2-sexual, awned ; gls. 2, narrow, thin . . 20. HYGUORKIZA. 



Spikelets 1-sexual ; fruiting gl. inflated ; leaves broad . 21. LEPTASPIS. 



Tribe III. ZGYSIE.E. Spikelets 1-fld., deciduous with their pedicels, 

 2-sexual, or some imperfect. 



* Spikelets fascicled. 



Spikes geminate ; fascicles unilateral .... 22. TEACHYS. 

 Spikes solitary; fascicles qutiquaversal ; gl. Ill echiuate . 23. TiiAGUS. 



** Spikelets solitary, rarely 2-nate. 

 Eacemes slender; pedicels flattened ; gl. I and II inuri- 



cate .24. LATIPES. 



Raceme slender; spikelets minute, base of gl. I saccate . 25. LOPHOLEPIS. 

 bpike very slender; spikelets narrow; gl. I and II 



awned ... 26. PEROTIS. 



Spike rigid ; spikelets appressed to the rachis, not awned . 27. ZOYSIA. 



II. Eachis of inflorescence usually articulate. 



Tribe IV. ANDBOPOGONEJB. Spikelets usually 2-nate, or the terminal 

 in the infl. 3-nate, pairs homo- or heterogamous. Fl. gl. smaller than the 

 empty, hyaline, often awned or reduced to an awn. 



Subtribe J. MAYDE^. Spikelets spicate, all 1-sexual; male spikes hi 

 terminal panicles, or continuous with the fern spike. 



B 2 



