444 
PENNISETUM— PEUCEDANTJM. 
am, peduncles sub-5-flowered ; leaves 
round cordate, very soft. 
C. Leaves simple, more or less angled, or 
lohed. 
zona'le, (liorse-slioe geranium, ^.) umbels 
matiy-flowered ; leaves heart-orbicular, ob- 
soletely-lobed, toothed, with a colored zone 
around or near the margin, 
in' quiridHx, (scarlet geranium, umbels 
many Howered ; leaves round-reniforra, 
hardly divided, crenate, viscid-downy. 
ncerifo'liuvi, (lemon or maple-leaf gera- 
nium, 7.) umbels about .5-flowered ; leaves 
5 lobe palmate, serrate ; below wedge-form, 
undivided. 
capita' Unn, (rose-scented geranium, Tp.) 
flowers capitate ; leaves cordate, lobed, 
waved, soft ; stem diffuse. 
quercifu'livm, (oak-leaf geranium, .) 
umbels sub many-flowered ; leaves cordate, 
pinnatifid, crenate; sinuses rounded; fila- 
ments ascending at the apex. 
grave'oleiis, (sweet-rose geranium, .) 
umbels many flowered, sub-capitate ; leaves 
palmate, 5 lobed ; divisions oblong, obtuse ; 
margins revolute. 
PENNISE'TUiVr. 3—2. (Grammecc.) [Pcnna, 
a feather, and se/a,3. bristle, from the feath- 
ery appearance of llie involucre ] 
glan'cum, (fox tail panic, J. 0.) perfect 
floret transversely rugose ; involucre of 
many fascicled bristles, scabrous upwards ; 
spike cylindrical. Var. jmrpuras"cens, 
sheaths hairy ; glumes and bristles of the 
involucre hairy. Introduced. 2 f. 
pun"geiis, [1X-) spike terete, strict; in- 
volucre niany-parted, 1-flowered ; segments 
terete, subulate, rigid, scabrous, a little 
longer than the florets. S. 
PENTIICyRUM. I0--5. (SempervivcE.) 
sedoi'des, (Virginian orpine, g-y. Ju. 2^.) 
stem branching, angled ; leaves lanceolate, 
Bub-sessile, 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. This plant, 
though it is placed in the class Didynamia, 
has the rudiment of a fifth stamen ; from 
hence its name.] 
pubcs"cens, (beard-tongue, w-p. J. ZX.) 
stem hairy; leaves serrulate, lance-oblong, 
ees«le ; flowers panicled ; the barren fila- 
ment bearded from the apex to below the 
middle. Var. latifo'lia, has broad, smooth 
eaves. Var. atigustifo'lia, has narrow, 
nairy, obscm-ely denticulate leaves. 1-2 f. 
Hill-sides. 
l(eviga'inm, (p. J. 2/.) smooth; leaves 
ovate-oblong, clasping at the base, slightly 
toothed, tlie 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- 
18 i. 
grandiflo'rum, very glabrous; leaves 
half-clasping, ovate oblong, entire; oppei 
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, 
shai-p-serrulate ; sterile filament bearded 
longitudinally ; segments of the calyx lin- 
ear-oblong. 12-24 i. 
cosrii'leum, (b. 11.) 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. 8. 
erian"thera, (p. J. 2^.) stem and leaves 
glabrous ; leaves sessile, lance-ovate, entire, 
sub-undulate 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. 
i al"bidum, (w.) low ; leaves lance-ovate 
; sub-serrulate, smooth, sessile ; flowers sub- 
j fascicled, axiUary and terminal ; sterile fila- 
I ment slenderly and interruptedly bearded 
! segment of the calyx lance-linear, pubei* 
i cent. 6-8 i. S. 
I dissec"tum, (p.) leaves opposite, sessile 
glabrous, compoundly dissected ; segments 
1 linear and generally obtuse ; flowers in 
j panicles ; stigma simple. 2 f. S. 
i campanula' ttis, produces light purple 
flowers, from Mar. to Oc. 18 i. Ex. 
ro'seus. 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. {Apocynece), [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 tho 
Canary Isles. 
PETALOS"TEMON. 16—8 (Leguminosce.) 
[From petalon, a petal, and sterna, a stamen, 
the petals and stamens united form a lube. 
can"didum, (w. Ju. 2^.) spike cylindrio, 
peduncled; bracts longer than the flower; 
calyx glabrous; leaves lanceolate, in 3 
pairs. 
viola'cemn, (r-p. Au. 21 ) 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 linear-oblong, about 7 
! pairs. 
j carne'um, (w. Ju. IX-) spike cylindric, 
pedunculate ; bracts subulate, as long aa 
I the glabrous calyx ; leafets lanceolate, en- 
j tire, small. 2-3 f. S. 
j corymbo'snm, (w. 8. li) peduncles in 
panicled corymbs ; calyx plumose ; leafets 
; lineal-, unawned, glabrous. 2 f. Dry sandy 
I pine barrens. S. 
j PEUCEDA'NUiM. 5—2. (UmbetdferecR.) [F om 
I peukcy fir, which its leaves resemble, ai>rf 
