POACEAE 
Leaf-blades puberulent oo often above: 
cora ths and oo lower internodes as- 
ending pubesce 
Leat. blades peus sheaths glabrous or minu- 
tely ciliate only 
pcos leaf- blades much reduced: stems 
branching fro ower noice only, the 
branches ea a branchin 
Uppermost leaf-blades about as ‘long as the 
others: stems bearing BR branches from 
the upper and middle o 
Leaf-blades not white- -margined o Vd obscurely so 
(or if ae margin is evi ident apilelets ony 
n 1 mm. long): spikelets glabrous or puber 
Stem branching only at base: plants soft, light 
green. 
Stem n at the nodes: plant firm or at 
ast not soft. 
Spikelets glabrous. 
Spikelets 1.1-1.2 mm. long: pennants 
rarely as much a 5 em. lon 
Spikelets 1.2- L 5 mm. long. 
Leaf-blades AT at least some of 
them 8-10 cm. lon 
Leaf- bl: ades not over 3 em. long. 
Spikelets puberulent. 
Spik ele E 1.1 mm. long: eee leaf-blades 
bluish-green, not glossy 
.9-1. m. lon 
lades A falcate, with ue 
: s hair mai gin near bas 
nts sti T Pe ls iry. 
Leat blades not involute, tip 
not faleate: plants bright- 
En winter leaf- blades conspicu- 
ous, glossy green 
XXIII. LANCEARIA 
Spikelets 1.5-1.6 d long 
Spikelets 2 mm. or ng. 
Leaf-blades, or Some of them, at least 8 mm. wide, 
lee a on e upper surface: fruit papillose- 
Leaf-blades not over 6 mm. wide (or if wider, pu- 
s rulent on the upper surface): fruit smooth 
nd shining. 
Spikelets 2.4-2. : mm. long: leaf-blades narrowed 
the base. 
Spikelets not mies 2.1 mm. lon 
Leaf-bl ae firm, glabrous above stem stiffly 
ascendin 
Leaf-blades ‘lax, softly puberulent on both 
surfaces: stem decumbent. 
XIV. OLIGOSANTHIA 
Nodes bearded: blades velvety-pubescent beneath. 
P S d Soft-velvety throughout: spikelets not 
over 
Plants stiff, pubescence harsh : spikelets about 4 mm. 
long. 
Nodes not bearded : leaf-blades not velvety. 
Sp m. Ta narrowly A subacute: plants oliva- 
appressed-pubes 
Spikelets broadly QUO turgid, blunt : plants green, 
pubescence, if any, n not appres sed. 
XXV. SCOPARIA 
Miren Soft-villous or velvety : Spikelets abruptly 
pol 
Pubescence when present not velvety. 
Spikelets elliptic: fruit about 2 5m . long. 
pikelets Pc that is, eee wp the middle: 
fruit 2 mm. “one or les 
90. 
91. 
104. 
105. 
pu 
oe 
. P. 
P. 
P. 
. P. 
. P. 
E 
. P. 
sedes 
tenue. 
. albomarginatum. 
trifo lium. 
vernale. 
chamaelonche. 
glabrifolium. 
ensifolium,. . 
concinnius. 
breve. 
flavovirens. 
portoricense. 
. Webberianum. 
patentifolium. 
lancearium. 
. patulum. 
malacophyllum. 
Ravenelii. 
. oligosanthes. 
. Seribnerianum. 
. Scoparium. 
P: 
aculeatum. 
