36 
CLASS III. ORDEii II. 
paleas 2-valved, awnless, onequal ; flowers 
m unilateral spikes, somewhat imbricated 
in 2-rows. (salt-grass.) 
Kyllin"ga. Flowers distinct, disposed 
in a roundish, sessile, sub-imbricated spike ; 
glumes 2-valved, 1-flowered; paleas 2, 
longer than the glumes, (bog-rush.) 
Okyzop"sis. Glume l-flowered, 2-valv- 
ed ; valves membranaceous, nearly equal, 
lax, obovate, awnless ; paleas 2, coriaceous, 
cylindric ovate, hairy at the base, the low- 
er one awned at the tip; scales linear-elon- 
gated; flowers panicled. (mountain rice.) 
KHyNCHOS"pORA. Glumes fascicled into 
a spike, the lower ones empty ; seed 1, 
crowned with a persistent style ; bristles 
surrounding the base, (false bog-ra.sh.) 
8ch(e'nus. Glumes fascicled into a spike, 
the lower ones empty ; style deciduous ; 
seeds naked. 
Scir"pus. Glume 1-valved, 1-flowercd, 
imbricated ou all sides; seed or nut naked 
or bri.stled at the base, (club rush.) 
Mie'gia. Flowers polygamous, panicled ; 
glume 2-valved, many-flowered, short and 
unequal ; palea.s 2, unequiil, the larger one 
acuminate; style very short, 3-cleft, plu- 
mose ; nectary 3 parted, divi.sions lanceo- 
late, acute, as long as the germ, large, 
acuminate, (cane.) <S. 
Nar"d[;s. Glume 1-liowered, 1-valved ; 
palea 1, included in the calyx ; stigma 1. 
Flowers spiked, alternating and sessile, 
(mat-grass.) 
Xy'ris. Calyx a cartilaginous glume, 2 
or 3-valved, in a head ; corolla 4-petalIed, 
equal, crenate ; capsule 3-valved, many- 
seeded, (yellow-eyed grass.) 
ORDKK II. DYGYNIA. 
A. Spikelels l -JUm-ei ed ; corollas withmit 
abortive mdimeids of Jlon ers at Ifw bi/se. 
[CoIt/x and corolla d/Jfl-re/d in texture.] 
Leer"sia. Calyx 0; corolla 2 valved, 
closed ; valves compres.sed, boat .shaped ; 
nectary obovate, entire, coflateral; sta- 
mens varjnng in number, (cut-grass.) 
Mil"ium. Glume 2-valved. naked, beard- 
less ; paleas 2, oblong, concave, .shorter 
than the glume, awule.ss; .seed 2 horned; 
flowers panicled. (cane.) 
Pas"palum. Glume in 2 membranaceous, 
equal, roundish valves; paleas awule.ss, 
cartilaginous, of the form of the glume ; 
stigma pluaio.se, colored ; nectary lateral ; 
flowers in unilateral spikes. 
Piptathe'rum. Glume membranaceous, 
longer than the caitilaginous, oval paleas; 
lower valve awned at the tip ; nectary 
ovate, entire ; seed coated. 
Aris'^tida. Glume 2-valved, membrana- 
ceous, unequal ; paleas 2-valved. pedicel- 
led, sub-cylindric, lower valve coriaceou.s, 
involute, 3-awned at the tip. upper valve 
very minute or obsolete ; nectary lateral, 
(beard gra.ss.) 
Sti'pa. Glume 2-valved, membranaceous ; 
paleas 2-valved, coriaceou.s, valves invo- 
lute, truncate ; awn terminal, long, cadu- 
cous ; seed coated, (feather-grass.) 
Sac"charum. Calyx iuvoluci'ed, with 
i long wool at the base, 2-valved ; corolla 1 
I or 2-valved ; stamens 1 to 3. (sugar-cane.) 
[Cali/x and corolla of similar texture— 
flowers in spreading panicles.] 
Agros"tis. Calyx herbaceous, 2-valved, 
1-flowered, valves acute, a little less than 
I the corolla ; corolla 2-valved, membrana- 
ceous, often hairy at the base ; stigmas 
longitudinally hispid or plumose; florets 
spreading; nectary lateral; seed coated, 
(redtop.) 
Muhlenberg"ia. Glumes 2, very mi- 
nute, unequal, one scarcely perceptible, 
paleas 2, many times longer than the 
glumes, linear-lanceolate, nerved, hairy at 
base, the lower one terminating in a long 
awn. 
Arun'^do. Calyx 2-valved, unequal, mem- 
I branaceous, sun ounded with hair at the 
I base, lower valve mucronate or slightly 
{ awned. Sometimes there is a pencil-form 
1 rudiment at the base of the upper valve. 
I (reed.) 
[Cnlyx and corolla of similar texture; 
flowers in compact panicles, often spiJcC' 
form.\ 
Phle'um. Calyx hard, 2-valved, equal, 
se.ssile, linear, truncate, bicu.spidate ; co- 
rolla enclosed in the calyx, 2-valved, awn- 
less, truncate, (timothy-grass.) 
, Alopecu'rus. Glumes 2, equal, gener- 
I ally connate at the base ; paleas 1-valved, 
! utricle-like, cleft on one side, awned below 
the middle, (foxtail -grass.) 
B. Spikelets \ floirered; corolla with 1 or 
2 abortive rudiments offo'cers at the base. 
[Calyx and corolla, of similar texture.] 
Phai.a'ris. Calyx membranaceous, 2- 
valved, valves keeled, nerved, equal in 
length, including the 2 valvcd. pilo.se corol- 
la ; the corolla is .shorter than the calyx 
and coriaceous; rudiments opposite, .ses- 
sile, resembling valves ; nectary lateral, 
(riband-grass, canary-grass.) 
C. Spikelets m a ny flo wered. [Flo wers tn 
panicles ; corolla, unarmed.] 
Phrag.hi'tes. Calyx 5 to 7 flowered; 
the florets on villose pedicels, lower 
valve elongated, acuminate, involute, up- 
jfer one somewhat coiiduplicate. 
Bri'za. Spikelets heart ovate, many- 
flowered ; calyx chalTy, .shorter than the 
: 2-ranked llorets; corollaventrico.se, lower 
valve cordate, upper one orbicular, short, 
(quake-grass.) 
Po'a. Spikelets oblong or linear, com 
pres.sed, many-llowered ; calyx shorter 
than the florets; corolla heriraceous, awn- 
less, often .scarious at the ha.se ; lower 
valve .scarious al the margin, (spear-grass.) 
Sor"ghu.m. Florets in pairs, one perfect, 
with a 3-valved corolla and sessile, the 
other staminate or neutral, and pedicelled. 
(broom-corn.) Ex. 
[Flowers in panicles ; corolla armed or 
mucronate.] 
' Dac"tyi,is. Spikelets aggregated in 
unilateral heads, many-flowered; calyx 
