PHRAGMITES-PINUS. 
125 
ciliate ; corymbs 5-flo\vered ; pedicels 3--cleft ; divisions of the corolla 
wedge-form, emarginaie; teeth of the calyx subulate, scarcely shorter than 
the tube of the corolla. Cultivated. 3-6 i, 
pqjranii'dalis,{p. Au. %.) erect, smooth ; stem scabrous ; leaves cordate-acute; 
panicle fastigiate, pyramidal ; segments of the corolla wedge-form, trun- 
cate ; leaves opposite, sessile, very entire. Mountain meadows. 2-3 f. 
PHRAGMITES. 3—2. (Gramine<B.) 
commu'nis, (Au. %.) calyx about 5-flowered ; florets longer than the calyx. 
6-12 f. 
PHRYMA. 13—2. (LabiatcB.) 
leptosta'chia, (p. w. %.) leaves large, ovate, toothed, petioled ; spikes terminal, 
slender ; flowers opposite, small. Shady woods. 2-3 f. 
PHYLLANTHUS. 19—5. {Euphorbias,.) [From phullon, a leaf, and anthos, flower, beCaus« 
the flowers in one of the original species, (since placed in another genus,) grow out of the 
leaves.] 
obova'tus, (S. ©.) leaves alternate, oval-obtuse, glabrous ; flowers few, axil- 
lary, pedicelled, nodding; stem erect ; branches distichus. 
PFYSALIS. 5—1. (SolanecR.) [From ^(AzAsao, to inflate, so called because its seed is contain- 
ed in a kind of bladder.] 
visco'sa, (yellow henbane, y. Ju. 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. 
ohscu'ra^ (y. p. Au.) 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'7iica, (y. S. %) stem branched; leaves ovale, obtuse; peduncles 
axillary, solitary, a little longer than the petioles. I f. Road-sides. 
alkeken'^gi, (winter-cherry,) leaves in pairs, entire, acute, sub-ramose below. 
Ex. 
rllYTOLACCA. 10 — 10. (AtripUces.) [Frorii jii^fon, a plant, and lakka, gum-lac, on account 
of the colour of its fruit.] :. 
dccan"dra, (poke-weed, w. Ju. %.) leaves ovate, acute at both ends ; flowers 
racemed ; berries flattened at the ends, 3-6 f. 
PINGUICULA. 2—1. (Sa-ophularim.) {Yxom pijiguis, 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, 
spatulate, 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. 
FINUS, 19—16. 
A. Leaves solitary^ with separate bases. 
canaden"sis, (hemlock-tree, M. Ij.) 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. T^,) leaves solitary, flat, 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, T2 ) leaves and 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.] 
Hg^'ida, (pitch-pine, M. T^,) leaves with abbreviated sheaths; starainate 
aments erect-incumbent ; strobiles ovate, scattered or aggregated; spine? 
of the scale reflexed. Though very common, it grows most plentifully oa 
barren, sandy plains. 
