PENNISETUM— PEUCEDANUM. 
tun, .) peduncles sub-5-flowered ; leaves I 
round-cordate, very soft, 
C. Leaves simple, more or less angled, or ; 
lohed. I 
zona'le, (horse-shoe geranium, .) umbels 
many -flowered ; leaves heart-orbicular, ob- 
Boletely-lobed, toothed, with a colored zone 
around or near the margin. 
in' quinans, (scarlet geranium, Ip .) umbels 
many flowered ; leaves roand-reniform, ! 
hardly divided, crenate, viscid-downy. | 
ncerifo'lium, (lemon or maple-leaf gera- I 
Ilium, 9 .) umbels about 5 flowered ; leaves ! 
o-lobe-palmate, serrate ; below wedge-form, j 
undivided. ! 
capita'tum, (rose-scented geranium, 1?.) | 
flowers capitate ; leaves cordate, lobed, 
waved, soft ; stem diff"use. i 
querciju'Uum, (oak-leaf geranium, '^.) \ 
umbels sub-many flowered ; leaves cordate, | 
pinnatifid, crenate; sinuses rounded; fila- [ 
ments ascending at the apex. | 
grave'olens, (sweet-rose geranium, ^.)| 
umbels many-flowered, sub-capitate; leaves 
palmate, 5 lobed ; divisions oblong, obtuse ; : 
margins revolute. I 
PENNISE'TUiVI. 3—2. (Graminea:.) [Penna, \ 
a feather, and seta, a bristle, from the fealh- , 
ery appearance of the involucre.] j 
glau'cum, (fox-tail panic, J. @.) perfect 
floret transversely rugose; involucre of ; 
many fascicled bristles, scabrous upwards ; ' 
spike cylindrical, Var. purpnras"cens, \ 
Bhealhs hairy ; glumes and bristles of the 
involucre hairy. Introduced. 2 f. 
pun" gens, spike terete, strict; in- 
volucre many-parted, 1-flowered ; segments 
terete, subulate, rigid, scabrous, a little 
longer than the florets. S. 
PEN'riIO'RUiVT. 10—5. {Sempervivce.) 
sedoi'des, (Virginian orpine, g-y. Ju. 11.) 
stem branching, angled ; leaves lanceolate, 
sab-scssile, unequally and densely serrate ; 
spikes secund, terminal, panicled, alter- 
nate and cymed ; seeds pitted. 12-18 i.* 
S. 
PENTSTE^MON. 13—2. (Bignonece.) [From 
pente, five, and sterna, stamen. 'I'his plant, 
though it is placed in the class Didynamia, 
has the rudiment of a fifth stamen ; from 
hence its name.] 
p7ibes"cens, (beard tongue, w-p. J. 24..) 
stem hairy ; leaves serrulate, lance-oblong, 
sessile ; flowers panicled ; the barren fila- 
ment bearded from the apex to below the 
middle. Var. latifo'lia, has broad, smooth 
leaves. Var. angustifo'lia, has narrow, 
hairy, obscurely denticulate leaves. 1-2 f. 
Hill-.side.s. 
l(Eviga'tum, (p. J. 21.) smooth; leaves 
ovate-oblong, clasping at the base, slightly 
toothed, the lower ones entire ; flowers 
paniculate; sterile filament bearded near 
the top. 1-2 f. Low grounds. 
frutes"cens, (p. ^ .) stem fruticose ; 
branches angled, pubescent above ; leaves 
lanceolate, obsoletely denticulate, sessile, 
nearly glabrous ; raceme terminal, sub- 
corymbed ; sterile filament bearded. 12- 
L8 i. 
grandijlo'ruvi, veiy glabrous ; leaveg 
half-clasping, ovate-oblong, entire; upper 
ones roundish ; flowers solitary and axilla 
ry ; sterile filament partly pubescent at the 
summit; segments of the calyx oblong, 
acute. 
gra'cile, (p. J.) stem smooth, slender 
leaves smooth, linear, acute, half-clasping, 
sharp-serrulate ; sterile filament bearded 
longitudinally ; segments of the calyx lin- 
ear-oblong. 12-24 i. 
coeru'leum, (b. Z|.) smooth ; radical leaves 
linear, entire ; cauline ones lance-linear, 
entire ; all sessile ; sterile filament short, 
bearded above ; segments of the calyx lan- 
ceolate, acute, glabrous. S. 
enan"thera, (p. J. 2^.) stem and leaves 
glabrous ; leaves se.ssile, lance-ovate, entire, 
Bub-undolate at the margin; peduncles 
many-flowered, secund ; segments of the 
calyx round-oval, acuminate; sterile fila- 
ment slightly bearded under the retuse 
point ; anthers pubescent. S. 
al"hidvm. (w.) low ; leaves lance-ovate, 
snb-serrulate, smooth, sessile; flowers sub- 
fascicled, axillary and terminal; sterile fila- 
ment slenderly and interruptedly bearded ; 
segment of the calyx lance-linear, pubes- 
cent. 6-8 i. 
dissed'tum, (p.) leaves opposite, sessile, 
glabrous, compoundly dissected; segments 
linear and generally obtuse ; flowers in 
panicles ; stigma siniple. 2 f. <S>. 
campanula' tus, produces light purple 
flowers, from Mar. to Oc. 18 1. Ex, 
ro'^eus, has red flowers. Ex. 
murraya'nus, the most 'beautiful species ; 
grows about two feet high, and produces 
brilliant scarlet flowers in August, Ex. 
PERIPLO'CA. 18—5. (Apocynea) [From 
peri, about, and ploke, twining.] 
grce'ca, (milk-vine, p. m. ^ .) climbing ; 
leaves opposite, ovate, acuminate ; flowers 
hairy within, and terminal. A native of the 
Canary Isles. 
PETALOS"TEMON. 16-8 {Le gummosa.) 
[From petalon, a petal, and sterna, a stamen, 
the petals and stamens united form a tube.J 
can" didnm, (w. Ju. Z^.) spike eylindric, 
peduncled; bracts longer than the flower; 
calyx glabrous; leaves lanceolate, in 
pairs. 
viola'ceum, (r-p. Au, ZJ!-) bracts about 
equal to the calyx ; little bracts spatulate, 
caducous ; calyx silky ; leaves linear, in 2 
pairs. 
villo'sum, (r. Au. 2.^.) villous; stem de- 
cumbent; spike large, cylindrio, sub-ses- 
sile ; bracts shorter than the woolly, 5-tooth- 
ed calyx; leafets hnear-oblong, about 7 
pairs. 
carne'um, (w. Ju. 1/.) spike eylindric, 
pedunculate; bracts subulate, as long as 
the glabrous calyx; leafets lanceolate, en- 
tire, small. 2-3 f, S. 
corymbo'sum, (w. S. 14..) peduncles in 
panicled corymbs ; calyx plumose ; leafets 
linear, unawned, glabrous. 2 f. Dry sandy 
pine barrens. S. 
PEUCEDA'NUM. 5—2. (UmbelliferecE.) [From 
peu/ce, fir, which its leaves resemble, aiwi 
