POGONATHERUM. ANDROPOGONE/E (AUCT. EDUARDO HACKEL). 191 
tieulati, rhachi fragili.: Spiculæ ad quemvis rhacheos nodum bin, 
primaria pedicellata a pedicello demum. soluta, secundaria sessilis 
cum rhacheos articulo aceumbente demum decidens, utraque 1—2- 
flora, secundaria 9, primaria staminibus effoetis 9, teretiuscula, 
aristata. Gluma I“ et II^ membranacez ; P? mutica, ecarinata, II^ 
illam paullo superans, carinata, infra apicem bidentulum aristam imper- 
fectam gracillimam longissimam exserens ; III: hyalina, vacua v. paleam 
solam v. etiam florem 5 diandrum v. rarissime hermaphroditum fovens, 
interdum (in spiculis pedicellatis semper) plane obliterata ; IV* hyalina, 
bidentata v. bifida, esinu aristam perfectam v. subperfectam (columna 
subobsoleta) ecapillarem longissimam edens. Palea glumam IV» 
sequans v. ea paullo brevior, hyalina, enervis. Lodieule nullze. Stamina 
1—2, antheris lineari-oblongis, loculis non nisi medio (ad filamenti 
insertionem) connectivo brevissimo conjunctis, sulco longitudinali 
dehiscentibus. Styli capillares, stigmata lineari-oblonga ex apice spi- 
culæ exserta superantes. Caryopsis obovato-oblonga, a latere leviter 
compressa, dorso magis quam ventre convexa, embryone */, caryopsi- 
dis zequante. 
Gramina orbis antiqui, humiliora, cæspitosa, perennia, ramosa, 
racemo aristis ereberrimis capillaribus patentibus crinito insignia. 
Species 2 inter se valde affines sequentia habent communia : 
Innovationes extravaginales, anthesi brevissimze, squamatee. Culmi 
erecti, dense cæspitosi, graciles, multinodes, fareti, teretes, glaberrimi, 
nitidi, estriati, apice breviter nudi v. fere omnino foliati, plus minus 
ramosi y. raro simplices. Vaginze superiores a culmo solutze, interno- 
dia :equantes v. superantes, inferiores iis breviores, imæ post delapsas 
laminas diu persistentes. Lamin® basi rotundata abrupte angustata 
vaginá multo angustiore cum vaginá articulatze, mox delabentes, quo 
fit ut culmi pars inferior vaginis aphyllis tunicata appareat, lineares 
v. lineari-lanceolatze, acuminatze, vernatione convolutze, adult plane, - 
eosta media tenui v. erassiuscula l-nervi subtus prominula supra 
angustissime albolineata munitze, nervis primariis utrinque 2—4 vix a 
seeundariis 5—7"! confertis distinctis, omnibus tenerrimis non promi- 
nentibus pereurs®. Racemus pedunculo e vagina summa plus minus 
exserto tenui insidens, erectus, compressus, densiflorus. Spieule ses- 
silis callus minutus, parcius et brevius, pedicellatze longius et copiosius 
barbatus. Gluma I»: membranacea v. inferne subchartacea, apice late 
truncata, ibique et infra apicem dense ciliata, marginibus non v. 
laxissime inflexa, dorso convexa; II“ membranacea, obtusiuseula, 
carinata, l-nervis, ejus arista recta, scaberrima ; IV* su 
icing | 
