ANDROPOGON.  ANDROPOGONEJE (AUCT. EDUARDO HACKEL). 361 
* Rhacheos articuli (saltem superiores), di teet gus longitu- 
dinali exarati, secus suleum tenues, diaphani, ad margines 
RR RR 7. Amphilophis. 4723 
2° Rhacheos articuli pedicellique non sulcati, opaces, marginibus 
us minus acutis. 
* Spieule sessiles caryopsisque a dorso subcompressz (in cultis 
interdum sabglobosg),...... e. onn itt 8. Sorghum. UF 4 4 
** Spioul® sessiles caryopsisque a latere obsoletius v. aiios 
compres IF w^ 
f Racemi idis multiarticulati..... 9. Vetiveria A f 
Tf Racemi uni- v. raro 2—6-articulati 10. Chrysopogon. | ij 7 
Series B. Hrrerozysı. Spicula sessilis parisimi v. plurium infimorum 
in omnibus racemis v. saltem ex binis in altero ab illa parium 
superiorum sexu, armis, sæpe etiam forma diversa, plerumque 
g v. neutra. 
a. Racemi in apice culmi ramorumye sepius plures (rarissime 2—1), A L 
spieule formå inter se congruentes .............Luleeee. ..1l. Dichanthium. ~ 7 
b. Racemi in apice culmi ramorumve bini; spieule Cj! et 8 formå plus d 
minus inter se discrepantes, raro subsimiles .........,... esu. 13. Cymbopogon. £ ^ 
c. Racemi in apice culmi ramorumve ied spieule Qj et '9 v. 8 fi * 
20 858 CIL E os. LFTESENTPCE TERT TETUER I PUR .12. Heteropogon. 56” 
Obs. Subgenera n. 7—10 inter se ita arcte affinia, ut etiam unius 
subgeneris sectiones haberi possint. 
Series A. Isozyeı. Spicule sessiles omnium parium, etiam infimi, in 
omnibus racemis sexu, forma, armisque inter se congruentes. 
Subgenus 1. ScHIZACHYRIUM. 
Benth. Fl. Austral. 7, p. 535; Schizachyrium Nees Agrost. brasil. 
p. 331; Andropog. Sect. Acropogon Fourn. Pl. Mex. 2, p. 62. 
Racemi subcompositi in apice culmi ramorumque solitarii, 2—multi- 
articulati; articuli crassi v. crassiusculi, recte v. suboblique disjun- 
gentes, disjuncti apice appendice scarioso irregulariter cupiliformi v. 
linguiformi dentato v. bifido* coronati. Spiculæ pedicellatz; sepius 
' Appendicem illum scariosum olim bracteolam habui (cfr. Mart. et Eichl. 
Fl. Brasil. vol. 2, pars 3, p. 296), cujus speciem omnino præ se fert. Nunc vero, 
evolutione hujus partis accurate observata, edoctus sum, spiculas pedicellatas 
