80 MR. G. BENTHAM ON GRAMINEA. 
Subtribus 1. Anthephorexe. Spicule in pedicello 3-0, in fasciculum 
deciduum conferte. Gluma florens nunc vacuis sublongior, nunc 
brevior hyalina. 
Subtribus 2. Euzoysiez. Spiculein pedicello solitarie, rarius gemine. 
Gluma florens vacuis brevior, hyalina. 
Tribus vi. Andropogone&. Spicule secus spicz rhachin v. paniculæ 
ramulos, sæpissime geminæ v. terminales ternæ, in quoque pari homo- 
gamæ v. heterogamæ. Gluma florens vacuis minor, hyalina, sæpe 
aristata. 
B. Poacrx. Pedicellus infra glumas continuus. RMhaochilla 
supra glumas inferiores persistentes sæpe articulata, ultra flores 
fertiles producta, stipitiformis v. glumas vacuas v. flores imper- 
fectos ferens, v. interdum flos fertilis more Panicacearum unicus 
terminalis, sed cum gluma sua a vacuis persistentibus articulatım 
secedens. 
Tribus vii. Phalaridez. Flos hermaphroditus unicus, terminalis. 
Glume 6 (v. 5 et palea) uninerves v. carinatz. 
Tribus viii. Agrostese. Spicule l-florz, rhachilla ultra florem nuda v. 
in setam v. stipitem producta. 
Subtribus 1. Stipeæ. Panicula laxa v. irregulariter spiciformis. Gluma 
Jlorens arista sepius terminata, fructifera caryopsin arcte involvens. 
Rhachilla ultra florem non producta. 
Subtribus 2. Phleoideæ. Panicula spiciformis densa, cylindracea v. sub- 
globosa. Gluma Jloreus mutica v. aristis 1-3 terminata fructifera 
caryopsin laxe includens. Rhachilla interdum producta. 
Subtribus 3. Sporobolez. Panicula laxa v. ad racemum reducta, raris- 
sime spiciformis. Gluma florens mutica. Caryopsis demum sepus 
glumis apertis subdenudata. Rhachilla non producta. 
Subtribus 4. Euagrostese. Panicula varia, sepius laxa. Gluma florens 
sepius arista dorsali instructa, rarissime mutica. Caryopsis gluma 
laxe inclusa. ` Rhachilla sepe producta. 
Tribus ix. Isachneee. Spicule zqualiter biflorze. Glumæ ssepius mu- 
tice. Rhachilla ultra flores non producta. 
Tribus x. Aveneae. Spicule bi- v. pluriflorz, szepius paniculate. Glumx 
florentes arista dorsali v. interdum terminali szepissime instructa. 
Rhachilla ultra lores szepius producta. 
Tribus xi. Chloride&. Spicule uni- v. pluriflore, secus rhachin spica- 
rum unilateralium biseriatim sessiles, secundze. 
Tribus xii. Festuce&. Spicule bi- v. pluriflore, varie paniculatz V 
rarius racemose. o Glumse florentes muticæ v. aristis terminatz. ` 
Subtribus 1. Pappophorew. Glume florentes plurinerves tri- pluri 
aristat@, v. absque aristis quadrilobe. 
Subtribus 2. Triodiez. Glume florentes uni- v. trinerves, tridentate, tri- 
fide v. triaristate, 
