1-48 
PIPTATHERUM— PLATYSTEMON. 
scales reflexed, lacerate ; bracts guitar- 
form. Ex. 
■pnn"gcm, (table mountain pine, "!?.) 
leaves by pairs, short, acute ; cones ovate- 
conical, spiijes of the scales long, subulate, 
incurved, lower ones reflexed. 40-50 f. S. 
tee' da, (M. 1?.) leaves long, by threes; 
Blieatlis long; strobiles oblong-conic, de- 
Kexed, shorter than the leaves ; spines in- 
flexed. Var. heterophyl"la,\Qdives in pairs 
and threes ; bark smootli. 
pahts"tris, (long-leaved, yellow, or pitch- 
pine, M. '9.) leaves by threes, very long; 
stipules pinnarifid, ramentaceous. persist- 
ent ; strobiles subcylindi'ic, muricate. Tim- 
ber, extensively used in the Southern 
States. 
PI'PER 2—3. (Urticece.) [Originally pwK^, 
in the Berigalese tongue.] 
IcpoKla' cliynn, (Florida pepper, @.) her- 
baceous, small, leaves obovate, obtuse, sub- 
3-nerved, pubescent; spikes axillary, flli- 
foi ra, erect, much longer than the leaves. 
6-12 i. S. 
PIPTATHE'RUM. 3-2. (Graminea.) [From 
pipto, to fall, and theios, harvest, summer.] 
racemo'sum, or Jiigrnm, (clustei-ed or 
black seed millet grass, Au. 2^.) panicle 
simple; flowers racemose, ovate-lanceolate ; 
corolla black, hairy ; awn as long again as 
the glume. 
PIS"T1A. 15—8. (Gerania.) 
spntkiila'ta, (w. Ju.) leaves abruptly nar- 
rowed into the petiole, dilated, round and 
obtu.se toward the summit. S. 
•M'SUM. 16—10. (LegmmyiosoR.) 
aati'vum, (pea, p. w. J. @.) petioles terete ; 
stipules round and creuate at the base; 
peduncles many-flowered. Var. vmbeUa- 
tnm, ^bouquet-pea,) has the stipules 4 cleft, 
acute. Var. qnadra'tum, (quadrate pea.) 
fruit a.sh col()r, 4-8ided. Var.hn'rnile, (dwarf 
pea:) stem erect, not climbing; leafets 
roundish. Ex. 
prr-irERIA.. 16—10. (Leguminosce.) [In 
honor of Dr. Pitcher of U, S A.] 
galnctoi'Aes., (r. 11) stem erect, rigid, 
branched, smooth ; leaves trifohate, oval, 
obtuse, glandular-dotted beneath. S. Flo- 
rida. 
^i^ANE'RA. 5-2. (Amentacea.) 
«.anuL"ica, (M. Ip.) leaves ovate, acute, 
seiTaie, equal at the base, slightly scabrous, 
short-potioled. 25 30 f. 6'. 
PLANT' A'GO, 4-1. (Plantagtnea.) [From 
planta, the sole of the foot, so calle'ci because 
its leaves are trodden under foot.] 
mn'jor, (plantain, w. J. Z/.) leaves ovate, 
Bub-dentate, sub-glabrous; scape terete; 
itpike oblong, imbricate'. 6-24 i. 
lanceola'ta, (English plantain, ripple 
grt.ds, J. ZX ) leaves lanceolate ; spike short, 
ovate-cylindrical; scape angular; capsule 
S-eeeded. 1-2 f. 
virgivf'ica, (dwarf plantain, r-y. J. 0.) 
boary-pubescent ; leaves lanceolate ovate, 
sub-denticulate ; spikes cylindric, with re- 
mote flowers ; scape angular ; cap 2 seeded. 
corda'ta, (w. J. 2^.) leaves ovate, cordate, 
nroad, sub-dentate, smooth ; spike very 
>one ; flowers sub-imbricate, lower jnes 
scattered ; bracts ovate, obtuse ; cells of th'l 
capsule 2-seeded. 12-18 i. 
me'dia, (w. J. 2/.) leaves ovate, pubes- 
cent, short-petioled ; scape terete ; spike 
short, cylindric ; cells 1-seeded. One va-, 
riety has the leaves hirsute and the spikes 
branching. 
mariti'ma, (sea plantain, Au. 2^.) leaves 
linear, grooved, fleshy, hairy near the ba.«e, 
scape round, terete ; spike cylindric; bracts 
acutish. 6-10 i. 
pussiV'la, (Au. @.) minutely pubescent; 
leaves linear-subulate, flat, entire, acute, 
scape terete, longer than the leaves ; spike 
cylindric, loose ; lower flowers di.stant ; 
bracts ovate, acute, as long as the calyx. 
cucnUa'ta, fJu. H..) leaves ovate-cucul- 
late, sub-denticulate, 9-nerved, pubescent 
beneath ; spike cylindric, imbricate ; scape 
terete. 
enopc/da, {H.) stemless petioles covered 
with long wool at the base ; leaves broad- 
lanceolate, alternate at each end, long pe- 
tioled, glabrous, entire, 5-nerved ; scape 
terete, glabrous, spike cylindric ; flowers 
remote ; stamens and styles long ; bracts 
broad-ovate, obtu.sish ; capsules 2-8eeded 
9-12 i. 
inlerrvp"ta, (Ju. 2_f.) leaves lanceolate 
entire, hairy; spike long, slender, inter- 
rupted ; flowers scattered, glabrous. S. 
gla'hra. leaves ovate, denticulate, smooth 
scape slender, sub-compressed, nearly equal 
to the leaves ; flowers scattered ; bracts 
ovate, acuminate. S. 
gnaphaloi'des, (Ju. 0.) silky-villose ; 
leaves lance-linear, very entire ; scajje te- 
rete, scarcely longer than the leaves; spike 
cylindric, intricate ; bracts linear, with long, 
viilo.se ciliaR. S. 
PLATAN"THERA. 18—1. (OrchidecB.) [From 
platys, broad, anthe'ra, anther, from the width 
of that organ.] 
orbicnla'ta, (g-w. J. 2^-) leaves 2, radi- 
cal, orbicular ; scape with 2 or 3 bract-like 
leaves, many flowered ; bracts shorter than 
the flowers ; lip lance-linear, obtuse ; spur 
longer than the ovary. 12 18 i. 
dilata'ta, (giant orchis, w. or g. J. li.) 
spur shorter than the germ ; lip entire, lin- 
ear, with the base dilated of the length of 
the spur; bracts of the length of the flower 
On mountains the flowers are green, in 
the meadows white. 1-4 f. 
PLATA'NUS, 19—13. (Amentacece.) [Frona 
plata, broad, alluding to the size of the tree ] 
Occident" alis, (buttonwood, American 
plane-tree, false .sycamore, 3.'^}.) leaves 5- 
angular, obsoletely lobed, toothed, pubes- 
cent beneath ; .stem and branches becoming 
white. One of the largest trees in North 
America. 
PLATYS'TEiVION. 12—12. (Papaveracea.) 
[From platus, broad, stemon, strand or fila- 
ment.] 
calif or" nicnm, (y-w. 0. leaves half clasp, 
ing, oblong, linear, obtuse, nntire. alternate, 
3-5-nerved; peduncles axillary, elorgated 
1-flowered; plant sparsely covered w'ltb 
shaggy, spreading hairs. Ca'ifo: n;a 
