fiEAMINEvE. 537 



Division VI: FAPPOPEOR-EM—Spikelets with the lowest flower fertile, tlie superior 

 usually abortive ; third andfoUowingglum.es multi-i-fid, with the lobes awned. Stig- 

 mas projecting from, the summit of the flower. 



23. PAPPOPHORUM, Schreb. j _ < 



Spiketets with severaI-1, distant, imperfect flowers above the fertile one : third and fol- 

 lowing glumes 9-13-awned. — Lignlar border ciliate ; panicle contracted. 



45. P. alopecnroides, F. Perennial, stout, glabrous, ("or pubescent at the 

 sheaths"); panicle long, cylindi-ical, pale : branches at length slightly loosened ; spikelets 

 with 2-3 superior rudiments : sterile glvmes l-nerved, fertile IS-nerved, imperfect ones 

 9-15-awned.— r«/i;, Sgmb. t. 51. KtA. S4v. t. 131, 132.— P. macrostachyum and 

 lagiu-oideum, Schrad.—i'-i' high ; panicle 2"-12" long.— Hab. Trinidad I, Or., La Tinta ; 

 [Brazil to Uruguay]. 



SuBTRiBE 3. CHLOUIDE.^.— Spikelets sessile or shortly pedicellate : lowest glume 

 placed against the axis. Sterile glumes 2, keeled-\-nerved, persistent ; rhaohis de- 

 ciduous. 



^ 24. BOUTELOUA, Lag. 



Spikelets with ] (-2) fertile, shortly stipitate flowers below, and l-several distant imper- 

 fect ones above them. Sterile glumes awnless, third and following ones 3-5(-7)-dentate : 

 the teeth of all or chiefly the imperfect ones awned. Stigmas projecting laterally from the 

 flower. — Spilces racemose or solitary ; axis produced beyond them. 



Sect. Heteeostega, Desv. — Spikes racemose : spikelets alternating along the edge of the 



46. B. litigiosa, Lag. Root fibrous ; stems low, geniculated-ascending ; leaves short, 

 flat, or convolute, ciliate or glabrescent at the base : ligule shortly ciliate ; spikes alternate : 

 spikelets 6-10, distant ; sterile glumes lanceolate-acuminate, the longer equalling the in- 

 temodes of the axis ; fertile flower single, bearded at the base, 3-toothed or shortly 3- 

 awned : upper rudiment reduced to a long, 3-partite, exserted awn. — Sm. Obs. t. 2. /. 2. — 

 Aristida americana, Sw. Heterostega juncifolia, Desv. {non Kth). Eutriana bromoides, 

 THn. (non Xtt.).— Leaves i"-2", sterile glumes li"'-2"', spikelets (the awu included) 4'" 

 long. — Hab. Jamaica {Sw.), in the southern sandy districts ; Antigua !, Wullschl. ; [Vene- 

 zuela!]. 



47. B. elatior, Or. [n. sp). Root fibrous; stems slender, erect ; leaves narrowly 

 linear, flat, ciliate, with 'long soft hairs near the base : ligule shortly ciliate ; spikes alter- 

 nate ; spikelets 3-5, distant ; sterile glumes ovate, acuminate, the longer about half as 

 long as the intemode of the axis , fertile flower single, bearded at the base, 3-toothed or 

 shortly 3-awned : upper rudiment reduced to a long, 3-partite, exserted awn.- — Allied to 



-£. aristidoides {Eutriana, Kth. N. Gen. t. 695), which has narrower sterile glumes. — li'-3' 

 high ; inferior leaves 6", sterile glumes 2'", spikelets (the awn included) 4'" long. — Hab*. 

 Antigua !, Wullschl., at Grace bay, S. Johns. 



y 25. LEPTOCHLOA, P. B. 



. Spikelets several-many-flowered, pedicellate in compound racemes. Sterile glumes awn- 

 less, fertile awnless or simply awned. Stigmas projecting laterally from the flower. Embryo 

 "slender." — Annual, erect grasses; leaves flat; spikelets distichous-1 -sided. 



Dinebra, Jacq. (Z. arabica, Kth.), is to be excluded, as by the stigmas projecting below 

 the sumfliit of the flower and sessile spikelets it approaches Eleusine. 



48. Ii. mucronata, Kth. Spikelets 2-4-flowered, awnless ; sterile glumes mucronate- 

 acute, fertile bluntish, slightly ciliate: rhachis glabrous. — Jacq. Mclog. Gram. t. 4. — '■ 

 Eleusine, Mich. E. filiformis, Pers. L. flliformis and tenerriraa, S.. S. L. pellucidula. 



