452 
POLYMNIA -PORCELIA. 
lanceolate, acTiminate, hirsute ; stipules hir- 
sute, ciliate ; stem erect, glabrous. 1-2 f. S. 
gra'cile, (g-w. @^.) dioecious, glaucous; 
racemes slender, filiform ; flowers deflected, 
longer than the peduncles ; peduncle artic- 
ulated to tiie calyx ; leaves spatulate linear, 
obtuse ; fruit longer than the calyx. 1-4 f. S. 
POLYM"NlA. 17—4. {Corymbiferm.) [Named 
from Polyhymnia, the muse of eloquence.] 
. canadcn"sis, (y. J. 2X .) viscid-villo.se ; 
leaves denticulate, acuminate, lower ones 
pinnatifid, upper 3-lobcd or entire. 2-4 f. 
Flowers in a loo.se terminal panicle. Shady 
hills. 
iiveda'Ha, (yellow leaf cup, y. Ju. 2X-) 
leaves opposite, 3-lobed, acute, decurrent 
into the petiole ; lobes sinuate-angled ; rays 
elongated. 3-5 f. 
POLYPO'DIUM. 21—1. (FiKces.) f From po/us, 
many, and pons, foot, because it has many- 
roots.] 
vulga'rc, (polypod. Ju. U.) frond deeply 
pinnatifid ; divisions lance linear, obtuse, 
Drenulate, approximate, upper ones gradu- 
ally smaller ; fruit dots solitaiy ; root chaffy. 
8-12 i. 
}i€xagonop"te'nim, (Ju. 2/.) fronds bipin- 
natifid, rather smooth, circumference trian- 
gular, lower divisions deflexed ; segments 
lanceolate, obtuse, ciliate, upper ones en- 
tire, lower ones adnate decurrent ; son mi- 
nute, solitaiy; stipe smooth. 12-16 i. 
conncc"tUe, (,Tu. 2X-) fronds bipinnatifid, 
ciliate, triangular ; divisions opposite, con- 
tiguous, adnate; segments sub elliptical ; 
stipe chaffy ; sori minute. 12 i. 
virginia'num, (Ju. H-) fronds deeply 
pinnatifid ; divisions lanceolate, obtuse, very 
entire, approximate, upper ones gradually 
smaller ; sori and root solitary. 
inca'num, (Ju. 11.) fronds dee])ly pinnati- 
fid ; divisions alternate, linear, very entire, I 
obtuse, upper ones gr.adually smaller, scaly 
beneath ; stipe scaly, fruit-bearing at the , 
apex ; sori solitary. S. 
POLYPRE'MUM. 4—1. {Gentianea.) [From 
polus, many, and premnon, stalk or shoot.] 
procum"/>ens, (w. Ju. stem herba- 
ceous, procumbent, fun-owed, margins of 
the furrows sharplj'^ serrulate, dichotomous 
above ; leaves opposite, linear, sessile, finely 
serrulate, sub-decunent. 6-12 i. 
POLYP"TERIS. 17—1. (CorymhifercE.) [From 
polus, many, and pteris, a wing, alluding to 
the many-valved (or winged) egret.] 
integrifo'lia, (1^.) erect; sub-scabrous, 
brpjiching above ; leaves alternate, sca- 
brous, entire, linear- 1 anceolate ; style 2 cleft, 
longer than the stamens. 3-4 f. S. 
POLYTRFCHUM. 21—2. (iVfusct.) [From 
jjolus, many, and thrix, hair, so called from 
its resemblance to hair ] 
juniperi'nuin, (hair-cap moss, M. 2^.) 
stem generally simple ; leaves lance-linear, 
entire, flattish, somewhat spreading; the 
apophysis depressed. In diy woods, &c. 
POMA'RlA. 10—1. (LcguviinoscE.) 
glatidulo'sa, (y. fp.) branching ; gland ular- 
Kunctate ; branches slender, sub-pubescent ; 
javes abruptly bipinnate; leafets ovate, 
obliqae at the base, entire, sesbile, sub-pi- 
lose smooth aud pale-green abo^ 3. S. 
PONTEDE'RIA. 6—1. {Narcissi.) [Name 
from an ancient botanist, Pontidera.] 
corda'ta, (pickerel -weed, b. Ju. 2J[.) 
leaves heart-oblong, obtuse ; spike many 
flowered, compact ; divisions of the corolla 
oblong. Var. angustifo'lia. leaves elonga- 
ted, triangular, truncate, and sub-cordate at 
the base. 1-2 f. 
POP'^ULUS. 20—8. {Amentacea.) [The orl- 
gin of the name is doubtful.] 
tremuloi'des, (white poplar, American 
aspen, Ap. leaves heart-roundish, ab 
ruptly acuminate, tooth-serrulate, glabrous, 
a little pubescent at the margin, with two 
glands at the base, on the upper side ; peti- 
oles compressed in the young state silky. 
20 30 f. 
bnhaniif^ra, (hal.«5am poplar, Ap. 
leaves ovate, acuminate, white, and net- 
veined beneath ; buds resinous. 70-80 f. 
nngtiht'tn, (balm of Gilead, Ap. ^.) 
leaves ovate-deltoid, acuminate, glabrous , 
branches wing-angled. 80 f. 
dihda'ta, (Lombardy poplar, Italian pop- 
lar, Ap. ^ .) leaves glabrous both sides, acu- 
minate, serrate, deltoid, the breadth equal 
to. or exceeding the length ; branches erect, 
close to the stem. It is said no pistillate 
plant of this species has been brought to 
America ; con.sequently no seeds are ob 
tained from it. 40-80 f. Ex. 
grandiden"tata, (tree poplar, Ap. ^.^ 
leaves round-ovate, acute, unequally and 
coarsely sinuate-toothed, glabrous, when 
young, villose ; petioles compressed. Var. 
/?er^"(i?^Z^^,branches pendulous. 40-50 f. 
betidifo'lia, (birch-leaf poplar, Ap. 1? .) 
leaves rhomboidal, long-acuminate, dentate, 
glabrous ; young branches pilose. 30-40 f. 
con"dicans, (Ap. ^.) leaves cordate, 
ovate, acuminate, obtusely and unequally 
seiTate, white beneath, sub-3-nerved, retic- 
ular veined ; petioles hairy ; buds resinous. 
40-50 f. 
Iceviga'tn, (cotton-tree, Ap. ^.) leaves 
round-ovate, deltoid, acuminate, sub-cor- 
date, unequally serrate, glabrous, plandular 
at base ; petioles compressed ; younger 
branches angled. 70-80 f. 
heterophyl'la, (various leaved poplar, M. 
^ ) leaves round-ovate, cordate ; the sinus 
small, cordate and somewhat auricled . 
when young, tomentose. 70-80 f. 
monohfe'ra, (Ap. leaves sub-cordate- 
deltoid, glabrous, glandular at the base 
with cartilaginous, sub-pillose, hooked ser- 
ratures ; nerves spreading ; petioles com- 
pressed above ; older branches terete 
60-70 f. 
grafca, (Athenian poplar, Ap. ^ .) leaves 
cordate-ovate, acuminate, obsoletely ser- 
rate ; petioles compressed. 20-40 f. Ex. 
PORCEL"IA. 12—12. (AnnoruB.) [In bono. 
of Porcel, a distinguished Spanish botanist.] 
trilo'ha, (custard apple, paw-paw, p. Ap. 
^.) leaves smoothish, oblong-wedge-obo- 
vate ; outer petals orbicular ; fruit large, 
fleshy. 30 40 f. 
paiinjlo'ra, (g-p. M. ^ .) leaves wedge- 
obovate, mucronate, under surface and 
branches rufous-pubescent; outer petali 
scarcely twice as long as the calyx. <{. & 
