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CLXXiii. GRAMiNEiE. (J. D. Hooker.) 5 



Splkelets 2-3-nate, in a simple spike, gl. I with tuber- 



^ cled penicillnte ribs 50. ElionuruS. 



■^pikelets solitary, terminaoing the branches of a thyrsoid 



P^oicle 51. Cleistachne. 



Spikelets capitate, male sessile, 2.fld., forming an involu- 



q •i.T^^^^^ ^^^^**^^ round the pedicelled fern. . . .52. GerMAInia. 

 fepikelets 2-nate, or the uppermost 3-nate, spicate, or 



c Pf^^cl^^^ .53. Andropogon. 



topikelets in 2 superposed series ; upper series of hetero- 



gamous pairs, and a terminal male, lower a whorl of 



^, .* Persistent males or neuters 54. AxTiilSTiRrA. 



^pikelets as in Anihistiria, but male and neuter spikelets 



deciduous with the fem.; callus . . • . 55, Iseilema. 



J- ^/^^ ■^" Poaceee- Spikelets continuous (not articulate with) their 

 pedicels, 1- luanj-fld. ; rachilla articulate at the base, and often between 

 ® ^S* gls. ; lowest fl. always fruiting, upper often male or neuter. 



Exceptions. Upper fl. alone bisexual in Phalaridece. Spikelets articulate on 

 ^eir pedicels, or gl. 1 and II separately deciduous occur in Alopecurus, Melicoy 

 ^yerhuthiay Cyathofju,s, and Sphcerocaryon. — See under Panicacece some genera 

 ^vith spikelets inarticulate at the base. 



Tribe 7. Phalaride^. Spikelets with a terminal perfect fl., and one or 



ore imperfect male or neuter below it : rachilla not produced beyond the 

 perfect fl. 



anicle contracted or spiciform ; spikelets awnless . • 56. Phalabis. 

 «^nic e spiciform ; gls. 6, III and IV neuter, awned; 



Pan" 1 T"*^ ^'^- AnTHOXANTHUM. 



anicle lax.; gh. 6, III and IV male, awned or not . 58. Hikrochloa. 



r.„^^^*"J© VI. Agrostideje. Spikelets 1-fld.; rachilla jointed at the 

 % aw^ 1 ^^^^ or not beyond the flg. gl. ; gls. 3, 1 and II empty, III 



^oeptions. Spikelets sometimes 2-fld. in Sporolohis and Muehlenhergia. 



g] iij*^^® I- Stipes. Spikelets panicled; rachilla not produced beyond 

 -"■ ; fl. gl. rigid or hard, awned (except Milium). 



q} }}} ^^^^ow, awn 3.fld 59. Akistida. 



q\ in ?®™'^' **wn entire, grain terete .... 60. Stifa. 



Gl' ITT l^^^f^f awn entire, grain dorsally compressed . 61. Oeyzo 

 • AAi obovoid, awn o-r^Wx ^ki^,,^ ' fi2 AtrT.in 



61. Oeyzopsis. 

 grain oblong '..'.. 62. Milium. 



gl- III h ^r"^^' Phleoide-E. Spikelets in spiciform or subspiciform panicles, 

 t^Pofth '^' loosely wrapping the grain; stigmas exserted from the 



<51. 1 ^5lf 1^^^^«^^^ ^^Mond the flg. gh 



Gl.IanH lTi^^*^'^"'^l^a"llI • . - • . • 63. HeLEOCHLOA. 



^^ "a a longer than III 64. Phlecm. 



Gl U^T}?}"" """^^ Produced. 



^l I and IT "^^^ ^1*^^' ^^1 > panicle cyllndric . . 65. Alopkcurus. 



^Annnutej panicle laxly suhspiciform . . 66. Phippsia. 



*^acted ^m^ "^^a ^^A^^ROSTE^. Spikelets usually small, in open or con- 

 l^terallv ^'^^'^^i- panicles; gls. usually thin or membranom*; stigmas 

 ^^i MuphT^f^^^ *^^°^ the spikelet. Spikelets rarely 2-tid. in Sparololun 



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