.GRAMINEAE. (155) 29 
TPOLYPOGON. Jesfont. atl. 
L5. "A. IE ue i NE 
às: 7 Up 
| Gluma uniflora, bivalvis, valvis subaequalibus , aristatis, Peri- 
anthium bivalve, inclusum, sessile, basi imberbe , valvula 
exteriori aristata. J7ores paniculati. 
1. P. tenellus, panicula coarctata subcylindracea , glumis 
dense villosis, perianthii arista dorsali tortili glumarum 
arista duplo longiori. (M.) v. v. 
PENTAPOGON, 
Gluma uniflora, bivalvis, aequalis, mutica. Perianthium pe- 
dicellatum, bivalve; valvula exterior apice 5-aristata , 
arista intermedia dissimili tortili: interior mutica.  $ti- 
^ gmata 2, sessilia, villosa. Flores paniculati. 
Oss, Calamagrostidi affinitate proximum genus, et diver- 
sum solummodo aristis. 
T. Billardieri, (D.) v. s. 
Agrostis quadrifida, Labill. nov, holl. 1. p. 20. t. 23. 
ARISTIDA, LZ. 
Gluma uniflora, bivalvis, membranacea, laxa, Perianthium 
pedicellatum , bivalve; valvula exterior arista terminali 
tripartita v, trifida, partialibus conformibus: interior mi- 
nuta, mulica, squamulas hypogynas vix superans, .$ta- 
. mina 5, | Styli a. Stigmata plumosa. Semen cylindraceum. 
Oss, Genus posthac dividendum; interea in sectiones dis- 
positum: ad secundam pertinent A, capensis aliaeque spe- 
cies africanae, et forsan A. Hystrix, cuius arista tripartita 
et cum valvula obsolete articulata,  Aristida americana 
est Chloridis species. 
.. l. Arista tripartita, cum valvula non articulata, 
1. À. vagans, panicula effusa rara: ramis pedicellisque 
strictis, glumis coloratis mucronulatis subaequalibus pe- 
: rianthio dimidio brevioribus aristas subaequantibus. (I.) 
k nca didi die 
Aristida vagans. Cav, ic. 5. p. 45. t. 471. 
2. A. ramosa, panicula subsimplici coarctata , glumis colo- 
^ Fatis inaequalibus perianthio $ brevioribus, aristis lon- 
^. gitudine florum , culmo erecto ramoso. (L) v. v, — 
.... &. A. calycina, panicula subramosa, glumis coloratis mucro- 
