PHRAGMITES—PINUS. 
125 
ciliate; corymbs 5-flowered; pedicels 3 cleft; divisions of the corolla 
wedge-form, emarginate; teeth of the calyx subulate, scarcely shorter than 
the tube of tiie corolla. Cultivated. 3-6 i. 
py rami'dalis, ( p. Au. Of-) erect, smooth ; stem scabrous ; leaves cordate-acute; 
panicle fastigiale, pyramidal ; segments of the corolla wedge-form, trun¬ 
cate ; leaves opposite, sessile, very entire. Mountain meadows. 2-3 f. 
PHRAGMITES. 3—2. (Graminea.) 
commu'nis , (Au. 2 f.) calyx about 5-flowc«Bed; florets longer than the calvx. 
6-12 f. 
PHRYMA. 13—2. ' (Labiata.) 
leptosta'chia ,, (p. w, 9f.) leaves large, ovate, toothed, petioled ; spikes terminal, 
slender; flowers opposite, small. Shady woods. 2-3 f. 
PHYLLANTHUS. 19—5. ( Euphorbia ,.) [From phullon, a leaf, and anihos, flower, because 
the flowers in one of the original species, (since placed in another genus,) grow out of the 
leaves.] 
obova'tus, (S. ©.) leave! alternate, oval-obtuse, glabrous ; flowers few, axil¬ 
lary, pedicelied, nodding; stem erect; branches distichus. 
PHYSALIS. 5—1. (SoIanecB.) [From jihusao, to inflate, so called because its seed is contain¬ 
ed in a kind of bladder.] 
visco'sa, (yellow henbane, y. Ju. 9f.) leaves in pairs, heart-oval, repand, ob¬ 
tuse, sub-tomentose, a little viscous; stem herbaceous, paniculate above ; 
fruit-bearing calyx pubescent. 2-3 f. Road-sides. 
obsen'ra , (y. p. An.) pubescent; stem prostrate, divaricate; leaves broad-cor¬ 
date, sub-solitary, toothed ; flower solitary, nodding; calyx hairy; flowers 
pale yellow, with 5 purple spots at the base; anthers bluish. Hills. 
pennsylva'nica , (y. S. 91) stem branched; leaves ovate, obtuse; peduncles 
axillary, solitary, a little longer than the petioles. 1 f. Road-sides. 
alkeken"gi , (winter-cherry,) leaves in pairs, entire, acute, sub-ramose below. 
Ex. 
PHYTOLACCA. 10—10. ( Atriplices .) [From phuton, a plant, and lakka : gum-lac, on account 
of the colour of its fruit.] 
dccan ,, dra , (poke-weed, w. Ju. Op.) leaves ovate, acute at both ends ; flowers 
racemed ; berries flattened at the ends. 3-6 f. 
PINGIIICULA. 2—1. ( Scrophularice .) [From pinguis, fat, so called because its leaves are 
greasy to the touch.] 
vulga'ris , (butter-wort, M. %.) spur cylindrical, acute, as long as the veinless 
petal; upper lip 2-lobed, lower one in 3, obtuse segments ; leaves radical, 
spalulate, ovate^ fleshy ; flowers solitary, nodding; tube of the corolla vil¬ 
lose, purple. Wet rocks. Rochester, N. Y. and N. to Canada. 
lute'a , border of the corolla 5-cleft; spur subulate, a little shorter than the 
tube. 6-8 i. Flowers yellow. S. 
PINUS. 19—16. 
A. Leaves solitary , with separate bases. 
canadcn"sis : (hemlock-tree, M. fy) leaves flat, denticulate, 2-ranked; strobiles 
ovate, terminal, Scarcely longer than the leaves. The bark is used in tan¬ 
ning leather. 
balsa'mea ,, (American silver-fir, balsam-fir, M. Tp.) leaves solitary, fiat, glau¬ 
cous beneath, somewhat pectinate at the summit; strobile cylindrical, erect. 
40-50 f. 
B. Leaves many , sheathed at the base. [Leaves in pairs.] 
resino'sa , (yellow-pine, Norway-pine, red-pine, M. fi>.)leavesand sheath elon¬ 
gated; strobiles ovate-conic, rounded at the base, sub-solitary, about half 
as long as the leaves ; scales dilated in the middle, unarmed. Bark of a 
reddish colour, and much smoother than the pitch-pine, or white-pine. 
Often grows very tall and straight. 
[Leaves in threes.] 
rig"ida , (pitch-pine, M. T 7 .) leaves with abbreviated sheaths; staminate 
aments erect-incumbent; strobiles ovate, scattered or aggregated ; spines 
of the scale reflexed. Though very common, it grows most plentifully on 
barren, sandy plains. 
