534 GllAMINEJ!. 



14. EiyNAUDIA, Kth. 



Spikelets awned from the 2-dentate summit of all glumes: flowers contiguous to the 

 sterile glumes, glabrous at the base. Palea 1 -nerved. Stamens 2.— A caespitose grass; 

 leaves setaceous, eiliate about the ligular border : nodes villous ; panicle short, subcon- 

 tracted. 



31. R. filiformis, Kth. — Kth. Mv. t. 9. — 1' high, naked above; panicle 1" long; 

 awns of the sterile glumes much longer than those of the flowers. — Hab. Jamaica !, 

 Wullschl., Manchester ; [Haiti]. 



Division III. STIPACSJE. — Character of k^osXiisw, hut fertile glume indurated 

 around the fruit. 



y 15; ARISTIDA, L. 



Spikelets awned : awn S-partite or 3-fid, terminating the fertile glume, the latter separated 

 by an internode from the sterile pair, usually shortly bearded at the base. Palea abortive. 

 Garyopsis free, cylindrical. — Spikelets'^erf«cg/We: 



Sect. CH.ETAKIA; P. B. — A^n 'persistent, naked. 



l/ 32. A. strictaj McA. Leaves convolute-filiform : ligular border shortly eiliate ; pani- 

 cle narrow, interrupted: branches solitary or geminate; sterile glumes acuminate, the 

 . superior usually with a bluntish, mucronate summit, exceeding a little or equalling the flower ; 

 awn-segments suhequal, divergent, as long as their glume. — P. B. Agrostogr. t. 8. y. 5 : 

 r analyt. (palea wrongly drawn). — A. americana, L. herb. sec. Munro {non Su>.) A. dispersa, 

 ' Tr. (A. bromoides, humilis, and coarctata, Kth.) :. a form with the spikelets usually coloured, 

 and setaceous flowers. A. cognata, Tr. : a form vrith botL.sterile glumes acuminate to the 

 summit. A. autillarum, PI. Carib. A. Adscensionis, Wiokstr. {non Sm.). A. maritima 

 andsahhiioidiiSteud. — The West Indian forms are annual, but the allied species {e.g. A. coeru- 

 lescens, Desf.) produce flowers also in the first year, and become perennial afterwards. Awns 

 4"'-6"' long.— Hab. Antigua!, Wullschl.; [United States ! to Chile]. 

 / 33. A. purpurascens, PosV. leaves convolute-filiform : ligular border shortly eiliate ; 

 ' panicle narrow, interrupted ; branches solitary or geminate(-3) ; sterile glumes setaceous- 

 , acuminate, the superior equalling the flower ; awn-segments diiergent : the middle about 

 thrice as long as its glume, the lateral less spreading and a little shorter. — A. Adscensionis, 

 Sw. {non L.). A. Swarlziana, Sieud. A. cognata, ft Trin. — Root in our specimens peren- 

 nial, middle awn 10"'-1 6'", lateral 8"'-12"' long. — Hab. Jamaica!^ Sw., in the sandy, 

 southern savannahs; [United States-!]. 



'^ 16. MILIUM,. i. 



Spikelets awnless, or with a simple, deciduous awn ; the flower coriaceous or chai'taceous,, 

 approximate to and included by the sterile glumes. Palea 3-nerved. Cargopsis free. — 



^ 



Sect. Leptocoryphium, Ns. — Spikelets awnless, jointed at the base. Fertile glume 

 k^ chartaceous, membranaceous at the summit. 



34. ra. lanatum, R. S. Perennial erect ; leaves convolute, hairy below and at the 

 , sheath or glabresceut ; panicle erect : spikelets elliptical-lanceolate ; sterile glumes woolly- 

 pilose, 5(-7Vnerved. — Kth. Rev. t. 163. — Paspalura, Kth. Leptocoryphium, iVi.— 2'-4' 

 high ; spikelets IJ'," long. — Hab. Trinidad !, Or. .- a form with the wool of the spikelets less 

 spreading; [Mexico I to Uruguay!]. 



