CLIII. GRAMINEiE. 1811 



Tbidb IX. TeBtuca,ceee.—Spikelets 2 or mon-flowered, pedicellate, rarelii sesalli, in effuse 

 or contracted, rarely spicijorm, panicles • rhacMlla articulate at the base and often at the bate of 

 the flowering glume, aboayt produced beyond the uppermost flowering glume. 



ScBTRiBE I. Papppolioreae.— SjjifccZets fexo or many-flowered ; glumes many-nerved, 

 flowering glumes many-awned or i to 5-lobed. 



Spikelets in simple of branohed spikes ; flowering glume many-awned . . 73. Pappophobdm. 



SuBTRiBE 11. Arundineie. — Spikelets paniculate, 2 to many-flowered ; giiimes very narrow, 

 flowers penicillate with long silky hairs on the callus or sides or both, lowest flowering glume 

 sometimes male or nevter. 



Bhaohilla very short ; flowering Rlumes glabrous, callus with long silky 

 hairs , 74. PnaAairiTis. 



SuBTRiBE III. Seslerieae.— Spikelets in spioiform panicles, or in spicate clusters with many 

 imperfect spikelets of imbricating glumes at the base of the spike or of the clusters, 1 or more- 

 flowered, 



Spikelets very minute, in globose clusters on an elongated simple rhaohia . 75. Elytbophobcs. 



SoniEiBE IV. ZSragrrosteee. — Inflorescence varioxis. Spikelets 2 to many-flowered; 

 flowering glumes 1 to 3-nerved, entire, S-toothed, 3-lobed or 3-airned. 



Panicle spicitorm ; spikelets 2 to 5-flowered ; flowering glumes soarious, 



seound, muoronate or shortly awned 76. Kceleru, 



Inflorescence various j spikelets many-flowered ; empty glumes shorter than 



the lowest flowering glume, 1-nerved ; flowering glumes 3-nerved ; grain 



minute , .' . 77. Eragrobtis. 



Several empty awned glumes above 1 or 2 flowering ones. Panicle narrow 



and dense or loose and spreading 78. Ectbosia. 



Many empty glumes above 1 flowering one, all awnless. Panicle contracted 



into a dense head or interrupted spike 79. Heterachne. 



Spikelets several-flowered, paniculate ; flowering glume with 3 narrow 



awned lobes 80. Tribaphis. 



Spikelets several-flowered, paniculate ; flowering glume with 3 unRwned 



lobes or teeth 81. Triodia. 



Spikelets several-flowered, awnless in a simple or in scattered spikes ; 



flowering glumes with a minute point between 2 small hyaline lobes . . 82. Diplaojine. 



Spetribe V; Centothecese* — Spikelets 1 to many-flowered, 1 to 2-seriate on the rhachis of 

 a simple spike or the long slender branches of a simple panicle. Leaves broad, tessellately nerved. 



Spikelets 3 or more-flowered, secund, persistent ; flowering glumes with 

 reflexed submarginal bristles 83. Centotheca. 



Suetribe VI. Eufestuceae. — Spikelets usually paniculate, 2 or more-flowered ; flowering 

 glumes 5, many (very rarely 3j nerved, uppper empty or none; styles slwrt. 



Spikelets few-flowered, in close seound clusters ; the first and second glumes 



shorter than the mucronate or awned flowering glume . . . . . . .84. *Dacttli3. 



Spikelets ovate, in a lax pyramidal panicle, pendulous ; glumes inflated, 



closely imbricate, many-nerved, dorsally convex . . . , . . . . ; 85. Briza. 

 Spikelets laxly paniculate, few-ttowered ; glumes keeled, 5-nerved, awnless, 



nerves rarely meeting at the tip 86. Poa. 



Spikelets paniculate, many-flowered, awnless ; glumes obtase, dorsally 



rounded, 5 to 9-nerved, lateral nerves short 87. Glyceria. 



Spikelets paniculate, many-flowered ; flowering glumes acute or awned, 



dorsally rounded, top of ovary naked or hairy 88. Festuoa. 



Spikelets paniculate, 3 to many-flowered ; flowering glumes mucronate or 



awned, dorsally rounded, 5 to 9-nerved, top of ovary lobed villous . . .89. Beomus. 



Trie i X. W,ord.eee, — Spikelets 1 or more-flowered, sessile, 1 to 2 or more-seriate on the rhachis 

 of a^ simple spike, or partially sunk in cavities of the same ; rhachilla usually articulate and 

 produced beyond the flowering glumes into a naked or glumiferous bristle ; glumes awned or not, 

 first and second opposite or subcollateral, persistent or separately deciduous, the first sometimes 

 absent or very minute. 



iSuBTEiEE 1. lMOlieee.—S2'>ikelets solitary at the nodes of the spike, plane of the spikelets 

 radial to the rhachis. 



Spikelets 3 to many-flowered; glumes coriaceous, one absent except in 



terminal spikelet 90. *Loi,i0M. 



Spikeleits 1 to 2-flowered ; 1st glume minute or absent, 2nd much longer 

 than the hyaline 3rd ; spike cylindrical, rhachilla glabrous 91. Leptobus. 



