P 
DIMERIA. ANDROPOGONER (AUCT. EDUARDO HACKEL). 17 
mutica, II^ ei simillima nisi ssepius latior, ssepeque paullo longior, 
IM vacua, hyalina, sspe secundum longitudinem complicata, IV. 
hyalina v. prope aristæ insertionem rigidior, carinata, 1-nervis, 
bidentata v. biloba (rarissime integra), ex sinu aristam exserens 
sæpissime perfectam. Palea minutissima v. obsoleta. Lodiculæ minu- 
tissimæ, ovario multo breviores. Stamina 2, alterum anticum, alterum 
posticum, filamentis brevibus. Styli distincti, stigmata brevia. 
Caryopsis linearis, a latere compressa; embryo circiter '/, caryopseos 
longitudinis æquans. 
Gramina plerumque gracilia, annua v. raro perennia. Culmi graciles, 
fistulosi, glaberrimi, non striati. Foliorum vaginze laxiusculze, laminze 
adulte lineares, acuminat®, plantule germinantis vero lamina 
prima (saltem in D. ornithopoda) late elliptica, obtusa ; culmeze sursum 
cito decrescentes, summa ssepe valde abbreviata v. obsoleta, verna- 
tione convolute, adulte planis, erectze, costa media tenui l-nervi 
subtus carinata supra latiuscule albostriata percursze. Racemi subses- 
siles vel unus alterve breviter pedicellatus, plus minus compressi, 
latere exteriori spiculas distichas ad quemvis nodum solitarias con- 
fertas ferentes. Rhachis depresse trigona. Spicularum pedicelli erecti 
v. appressi, a ventre compressi, subelavati, post delapsas spiculas 
apice recto angulo retusi. Spieulee non ventre nec dorso sed lateribus 
rhachi appressze, dum clausæ sunt lineares v. lineari-oblong:e, callo 
plerumque brevissimo obtuso breviter v. brevissime albo-barbato. 
Gluma I** acinaciformis, uninervis, anthesi patens v. patentissima, 
inde racemi eonfertiflori anthesi pectinati; II uninervis, IHI. ple- 
rumque enervis. Arista glumæ IV“ gracilis v. gracillima, columna 
recta, quam subula basi laxe torta scabra brevior. Antherarum loculi 
apice parum, basi ad '/, usque hiantes. Stigmata per anthesin prope 
spieule basin exserta rarius in sinu glumarum erecta. 
Crescunt in Asia tropica et orientali usque in Japoniam, Archipe- 
lago Malayano, Australia tropica. 
A. Racemi in culmi ramorumve apice solitarii, hujus directionem servantes 
odes, teretiusculi. Vagin® teretiuscule, laxæ 
nodiis multo breviores; ligula hyalina, age laminæ e basi »quilata 
anguste v. angustissime e lineares, suberect®, virides. Racemus erectus, 
strictus, crassus, densiflorus, livide ee pilosulus, rhachi recta. 
I 
Spicule dense imbricate ; gluma IIda Jmam conspicue superans, mucro- . 
nata; IIa linearis, obtusa, enervis, apice ciliata; IV^ breviter bidentata, 
glabra; aristæ columna fusca glaberrima e glumis longe exserta, subulä 
N * 
E 
