406 MONOCOTYLEDONEJ. ANDROPOGON, 
dorso convexulo sine sulco, apice cum v. sine appendice cupuliformi 
scarioso. Spiculæ sessiles omnium parium 2, raro 9, rarissime paris 
imi alterius racemi neutra, tum vero a pedicellata hujus paris formá 
discrepans, plerumque aristat®, a dorso compresse : gluma I”* mar- 
ginibus implicata inde bicarinata, rarissime subinvoluta ; II?* carinata, 
IIl hyalina, IV* hyalina v. raro membranacea, oblonga v. linearis, 
sepius bifida v. bidentata, ex fissura aristata, rarius mutica integra, 
plerumque paleam fovens. Stamina 1—3. Ovarium glabrum ; stigmata 
oblonga v. ovato-oblonga, stylos plerumque :equantia v. iis subbre- 
viora, prope mediam spiculam exserta. Spieule pedicellate 5 v. 
neutre v. tabescentes, rarissime 8, muticz v. raro aristat®, a sessi- 
libus glumarum forma + discrepantes. Caryopsis plerumque lanceo- 
lata v. lineari-oblonga, a dorso subeompressa, dorso convexa, facie 
planiuseula, embryone dimidiam caryopsin zequante. 
Gramina habitu sat vario, angustifolia, amphigæa, etiam in tempe- 
ratis sparse obvia. — Culmi ssepius ramosi, ramis floriferis nune plus 
minus remotis, nunc confertioribus et paniculam spuriam forman- 
tibus. Rami ramulique infra racemos vagina ssepius aphylla (spatha 
propria) racemos nunc fuleiente v. obtegente nunc ab illis remota 
instructi. Vaginz ad nodos glabrz. Laminz vernatione conduplicata 
. v. convoluta. Racemorum terminalium pedunculus specialis rectus.— 
Species nonnullae (e. gr. A. macrourus affnesque) propter racemos 
conjugatos spathis fultos Cymbopogones :emulant, sed differunt spicu- 
larum paribus omnibus heterogamis. 
8 1. Spicule sessilis gluma II“ mutica, rarissime mucronulo v. aris- 
tula brevi terminata. — Racemi bini v. plures (n. 34—72). 
—» Lem 
A. Spicule pedicellate tabescentes, 1—2-glumes v. prorsus deficientes, sessilibus 
ber m breviores. — Perennes. Innovationes mixte, plersque 
Smprus extravaginales. Culmi inferne simplices, superne plerumque 
ramosi, multinodes, + compressi, latere vaginæ dorsum respiciente 
sulcati, glaberrimi. Vaginæ innovationum carinato-compressæ, cul- 
meæ compressiusculæ. Ligula brevis v. brevissima, membranacea, trun- 
cata. Laminæ vernatione conduplicata, adultæ planæ v. complicatæ, 
e basi æquilata lineares 
r , Subtus acute carinatz, costa media tenui uninervi 
TIN cellulis bulliformibus induta, nervis lateralibus parum v. minime - 
denda m. pedicellique utroque margine v. etiam 
E osi, articulum æquantibus v. superantibus. Spiculæ 
sessilis callus minutus, obtusus, barbatus (n. 34—47). 
er 
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