ERIANTHUS. _ ANDROPOGONEA (AUCT. EDUARDO HACKEL). 129 
v. infra apicem bidentatum aristam exserens plerumque imperfectam 
raro plus minus perfectam ; palea hyalina, gluma sua paullo—pluries 
brevior, enervis. Lodieulie cuneatæ. Stamina 2—3. Stigmata lineari- 
oblonga plerumque ad latera spieule exserta. Caryopsis oblonga v. 
lineari-oblonga, ventre planiuseula, dorso convexa ; embryo caryop- 
seos dimidium »quans. : 
Gramina perennia, arundinacea, in utriusque orbis zona tropica 
rarius in temperata obvia. — Culmi erecti, farcti, striati, simplices. 
Vagin® aretz, teretes v. raro teretiuscule, innovationum subeom- 
press, striatz, inferiores internodia superantes, superiores eis zequi- 
long v. breviores. Laminæ elongatze pro longitudine ssepius anguste, 
lineares v. laneeolato-lineares, vernatione convolutz, adulte plans 
v. rarissime convolutze, superiores decrescentes quidem, sed summa 
bene evoluta, nec rudimentaria, omnes costa media basi crassa v. 
crassissima plurinervi supra late albostriata percurs®. Panicula 
scpius spectabilis, multiramea, plerumque lanata ; rami primarii infe- 
riores basi brevi tractu nudi, superiores cum ramulis secundariis ter- 
tianisque a basi spieuliferi. Racemorum rhachis semper articulata, 
articulis plerumque demum disjunetis, junctura recta. Spicule lan- 
ceolatz v. oblong&, sspe angustz, callo brevissimo (0,5—0,6 mm. 
longo) v. minuto, obtuso, sæpissime villoso. Spiculæ pedicellate cum 
sessilibus conformes, sed plerumque densius villos®, earum gluma 
I"* manifestius nervosa, nervis plerumque imparibus. 
Genus inter Saceharum et Polliniam omnino intermedium, cum 
priore mediante E. maximo Brogn., eum ulteriore mediante E. fasti- 
giato Nees arctissime conjunctum, a Saccharo sola arista, a Pollinia 
inflorescentia (et arista sepius imperfecta) distinctum. 
A. Diandri, neogei (Erianthus Michx. sensu stricto). — Rhachis fragilis 
spiculæ secundaris sessiles cum articulo accumbente demum decidentes. 
— (Spec. 1—5.) 
a. Panicula lanata, oblonga y. lineari-oblonga. — Lamins nervis supra 
min 0 
i 
tariis v. binis, crassiusculis, pilosis, inferne brevi spatio (vix ad '/, usque) 
nudis, secundarios et "— ia et waperiorés solitarios Y»; PN Hp 
ed ; 
vel inæqualibus spicula a v. raro duplo baike o 1—4) 
a. Anthere 2—2,5 mm. longæ, anthesi e spicula expulse. Stiymata anthesi ezserta. — 
Culmi infra nodos non v. rarissime pruinosi, panicula matura basi non vaginata. ; 
1. E. saccharoides (Michx. Fl. bor. amer. 1, » 55 ar 5 
Surre au Prodromus VI. 
