SYNOPSIS or THK GENERA. 



26. Aoros'tis, [Page 91.] Panicle loose. 67«w?« two, unequal, 

 longer than the glunielles. GliimdUs two, unequal, the 

 shorter valve largest, with or without au awn, the inner one 

 someiinies wanting. 



f f Spikelels tivo or three-floioered. 



26. Catabro'sa, [Pnge 96.] Panicle loose or close. Spikelels 



two or three flowered, sometimes with a fourth imi)erfecl 

 floret. Glumes unequal, membranous, ohlu.se, much 

 shorter than the florets. Glumelles nearly equal, ribbed, 

 awnless, the extremity truncated, erose. 



27. Ai'KA, [Page 90.] Panicle loose or close. Spikelels two 



flowered. G/wwes unequal. Glumelles unequal, the outer 

 valve mostly awned near the base. Fndl free. 



28*. Hol'cus, [Page 102.] Panicleloose. Spikelels ivio ilowered. 

 Glumes nearly equal, longer tlian the florets ; lower floret 

 perfect and awnless ; upper with stamens only, aiid awucd. 

 Fiiiit coated with the indurated gUnnelles. 



20. Arbhen'atu'erum, [Page 104.] Panicleloose. Glumes two 

 unequal, two flowered ; lower floret with stamens only, and 

 a \oi>^ jujiiied awn, ari.^5ing from near the base of the outer 

 valve ; the vpper perfect, and the outer valve with a short 

 straight bristle near the apex. 



30 Pani'cum, [Page 105.] Panicle erect, compound. Glumes 

 two, unequal, two-flowered; the lowest smallest, pointed 

 or awned. Florets dissimilar. Glumelles of the fertile 

 floret two, cartilaginous, the external one concave, the in- 

 ternal plane ; glumelles of the neuter or male floret, one or 

 two ; the external membranous, jjointed, or awned ; the 

 inner smaller, often absent. 



31. Seta'kia, [Piige lOG.] Panicle spiked, cylindrical. Glumes 



two, unequal, two-flowercd, the spikelels supported on short 

 branched pedicles, two or three of which are supjwrtcd by 

 a bristly involucre. Florets dissimilar. Glumelles of the 

 perfect floret two, unequal, carlalaginous ; glumelles of the 

 neuter or male floret, one or two ; membranous; the smaller 

 one sometimes absent. 



32. Sesle'ria, [Page 107.] Panicle sp'ikei. Glumes two, nenrly 



equal, pointed or awned at the aj)cx ; glumelles nearly 

 cfjual ; the outer jagged, awned, at the apex ; the inner 

 bifid. 



33. HiERO'CHLOE, [Page 108.] Panicle spiked. Glumes two, 



