534 GRAMINEtE. 



14. REYNAUDIA, Kth. 



Spikeleis 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 csespitose grass; 

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

 tracted. 



31. R. filiformis, Kth.— Kth. Rev. 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. STI P ACE JE.— Character of Agrostidese, but fertile glume indurated 



around the fruit. 



15. ARISTIDA, £. 



Spikelets awned : awn 3-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. 

 Caryopsis free, cylindrical. — Spikelets pedicellate. 



Sect. Ch^taria, P. B. — Awn persistent, naked. 



32. A.^stricta, Mich. Leaves convolute-filiform : ligular border shortly ciliate ; pani- 

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

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

 awn-segments subequal, divergent, as long as their glume. — P. B. Agrostogr. t. 8. f. o : 

 analyt. (palea wrongly drawn). — A. americaua, L. herb. sec. Munro (non Sw.) A. dispersa, 

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

 and setaceous flowers. A. cognata, Tr. -. a form with both sterile glumes acuminate to the 

 summit. A. antillarum, PI. Carib. A. Adscensionis, Wickstr. (non Sw.). A. maritima 

 and subbiflora, Steud. — The West Indian forms are annual, but the allied species (e.g. A. cceru- 

 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, Poir. Leaves convolute-filiform : ligular border shortly ciliate; 

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

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

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

 Sw. {non L.). A. Swartziana, Steud. A. cognata, j3, 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!]. 



1 6. MILIUM, L. 



Spikelets awnless, or with a simple, deciduous awn : the flower coriaceous or chartaceous, 

 approximate to and included by the sterile glumes. Palea 2-nerved. Caryopsis free. — 

 Spikelets paniculate. 



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

 chartaceous, membranaceous at the summit. 



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

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

 pilose, 5 (-7) -nerved. — Kth. Rev. t. 163. — Paspalum, Kth. Leptocoryphium, Ns. — 2'-4' 

 high ; spikelets IV" long. — Hab. Trinidad !, Cr. : a form with the wool of the spikelets less 

 spreading; [Mexico! to Uruguay!]. 



