1810 CLiii.' graminej:. 



Tbibe v. PhalarldeWi — SpiUelet* with a terminal perf&t flower, and one or more impfr- 

 feet male or neuter below it; rhaehilla not produced beyond the perfect flower. 



Pnniole contracted or spiclform ; e^iikeleta awnle^s ; stamens 3 49. 'Philabis. 



Spikelets in panicles more or less awaed. Stamens 4, rarely 2 . . , ./^ . 50. .Micbol^na, 



Tbibe VI, AgrrostldeSD. — Spikelets 1-flowered ; rhaehilla articulate at the base, pro- 

 dnced or not beyond the flowering glnme ; gli(me 3, 1st and 2nd empty, 3rd flowering avmed. 



SuBiEiBE 1. Stipese. — Spikelets paniculate ; rhaehilla not produced beyond 3rd glume : 

 flowering glume rigid or hard, atcned. 



3rd glume narrow, awn 3-branolied 51. Akistida. 



3rd glume narrow, awn entire, at length articalate on the glume 53. £tipa. 



3rd glume narrow, awn entire, continuous with the point of the glume . . 53. Stp.eptachne, 



SoDTElBE 2. Phleoideae. — Spikelets in epiei/orm or subspieiform panicles, 3rd glume 

 hyaline, loosely wrapping the grain; stigmas exserted from the top of the spikelet.'" 



1st and 2nd glumes longer than the 3rd ; pfinicle cylindrical. Bhachella 

 not produced beyond the flowering glume 54. AiiOPECcnrs. 



Subtbibe 3. EuagTOBteae. — Spikelets usually small, in open or contracted many flowered 

 panicles ; glumes usually thin or membranous ; stigmas laterally exserted from the spijctlet, 

 spikelets rarely 2-flowered in Sporobolus. 



Spikelets 1-flowered, capitate; rhaehilla continued in a small biistle; 



flowering glume 3-lobed, the central lobe awned 55. EoHlNOPoaoa. 



Spikelets 1-flowered, capitate; rhachis not produced above the flower; 



lobes of flowering glumes B, all with points or awns . . 56. Amphipogoh. 



Spikelets and pedicels inarticulate, 1st and 2nd glumes persistent. 



Glumes all awnless ; 1st and 2ad 1-nerved, pericarp of grain IbOse . .< . 57. Spobobolus. 



Glumes 1st and 2nd snbequal, l-nerved, awnless, awn of the 3ril dorsal 



or wanting , 58. ASrostib. 



Ehaehill a produced beyond' the 3rd glume, usually penieillate with l&ng 



silky hairs ; 1st and 2nd glumes 3-nerved 59. Detbtixu. 



Bhachilla not produced beyond the flower; awn flue near the tip of the 



glume. Palea more than J as long as the glume 60. DicnEncHNE. 



.■■..•:.*,-ii :.! A . 



Tbhie VII. Avenese. — Spikelets 2 or more floieered, paniculate very rarely spicate, or 

 panicle subspieiform; flowering gliimes usually awned, awn geniculate 'and often tmisted', rarely 

 straight or wanting ; rhaehilla produced or niit beyo7id the upper flowering glume. 



SuBTKiBE 1. Alrete. — Spikelets 2-floivered; glumes membranous \ rhaehilla not produced. 



l»t glume acute, many-nerved ; flowering glume long ciliate 61. Ebuchne. 



Spikelets 2-flowered, fruiting glumes close together, not hardened round 



the grain . . ; 62. Micbaiba. 



Spikelets awnless, 3rd glume largest bi-sesual, 4th male 63. Ccelachne. 



Stotriee 2. Buaveneae.— -Spifc«fe(s 2 or more-flowered ; rluichilifi, priiipii^d. 



Spikelets 2-flowered, lower flower bisexual awnless, upper male or neuter 



awned 64. 'Holcds. 



Spikelets 2 to 6-flowered ; flowering glomes awned, awn subterminal or 



dorsal 65. *Avbna. 



Spikelets 3 or more-flowered ; flowering glume deeply cleft, awned in the 



cleft 66. Danthonia. 



Spikelets l-flowefed. Urge, with long awns ; awns 3, central one long 



twisted and bent 67. Anisopogon. 



Tribe VIII. Cbloridex.—Spikelets 1 or more flowered, 2-seriate (sometimes very dittaMly) 

 and secund on an inarticulate spike or o;i the sgiciform branches of a slender panicle; fiowert all 

 or the lower only bisexual; rhaehilla produced or not beyond the upper flowering glume. 



* Spikes or spiclform branches digitate^ racemose or paniculate (or solitary in Chloris.) 

 Spikelets l-flo\yered, awnless, in digitate spikes, the thachia of the spikelet 



not at all or minutely produced above the flower 68. Cynodos.' 



Spikelets 1-flowered, awried, in a simple or in digitate gpikes, with 1 or more 



empty glumes above the flowering one 69. CHtr.oBra. 



Spikelets several-flowered, sessile in 2 rows on one side of 1 or 2 simple 



spikes. Lobes of the flowering glumes 3, the central one alone awned ' . 70. Astrebla. 

 Spikelets several-flowered, awnless or with long-poilited glumes, in digitate 



or scattered spikes. Grain or seed witliin the pericarp loose and rugose ." 71. EiiEusine, 

 Spikelets se<K!etal or rarely 1-flowered ; awnless in soattflred spikesi Grain 



Hmooth, the pericarp adnate ...,,...,..,,.,, 72. Lehochioa. 



