124 PENTSTEMON-PHLOX. 
PENTSTEMON. IS— 2 CBignonece.) [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.] 
pubes^'cens, (beard-tongue, w-p. J. %.) stem hairy ; leaves serrulate, lance-ob- 
long, sessile; flowers panicled ; the barren filament bearded from the apex 
to below the middle. Var. latifolia, has broad, smooth leaves. Var. a'ti- 
gustifolia^ has narrow, hairy, obscurely denticulate leaves. 1-2 f. Hill- 
sides. 
Usviga'ium, (p. J. %.) smooth; leaves ovate-oblong, clasping at the base, 
slightly toothed, the lower ones entire ; flowers paniculate ; steril filament 
bearded near the top. 1-2 f. Low grounds. 
PERIPLOCA. 18—5. iApocynecB.) [From pen, about, and pZo^e, twining.] 
grce'ca, (milk-vine, p. m. Tj.) climbing; leaves opposite, ovate, acuminate; 
flowers hairy within, and terminal. 
PETALOSTEMON. 16—8. (LeguminoscB.) [From peiaZow, a petal, and sterna, a stamen, the 
petals and stamens united form a tube.] 
can"di'dum, [w. Ju. "2]..) spike cylindric, peduncled; bracts longer than the 
flower ; calyx glabrous ; leaves lanceolate, in 3 pairs, 
viola'ceum, (r-p. Au. %.) bracts about equal to the calyx ; little bracts spatu- 
late, caducous ; calyx silky ; leaves linear, in 2 pairs. 
PHACA. 16—10. (Leguminoscn.) [A Greek word signifying lentil.] 
villo'sa, (y. Ju. %.) nearly stemless, villose ; leafets oval, glabrous above ; pe- 
duncles as long as the leaves ; legumes hoary ; villose, oblong. 
PHALARIS. 3—2 (GraminecB.') [From phalos, shining, so named from the appearance of its 
seed.] 
america^na, (riband-grass, wild canary-grass, Ju. %.) panicle oblong, spiked ; 
glumes of the calyx boat-shaped, serrulate; corolla unequal ; rudiments 
hairy. Var, picta, leaves variously striped. This variety is the riband- 
grass of the gardens, 2-5 f. 
PHASEOLUS. 16—10. {Leguminosa..) [From phaselos, a little boat, which its pods were 
thought to resemble.] 
peren'^nis, (wild kidney -bean, p. Ju. twining, pubescent; leafets. ovate, 
acuminate, 3-nerved; racemes 1-3, axillary, paniculate, longer than the 
leaves; bracts minute; legumes pendulous, broad, falcate, mucronate; 
flowers large. Dry woods. 
luna'tus, (Carolina bean, Lima bean, g-w. Ju. ©.) twining; legumes cime- 
ter-form, sub-lunate, smooth ; seeds compressed. Ex. 
vulga^ris, (common pole-bean, p. w. Ju. C2)-) stem twining; racemes solitary, 
shorter than the leaves ; peduncles in pairs ; bracts smaller than the calyx, 
spreading; legumes pendulous. From the East Indies, 
na'nus, (bush-bean, six-weeks-bean, CD-) stem erect, smooth ; bracts large.* 
than the calyx ; legumes pendulous, compressed, rugose; seeds variously 
coloured. Ex. 
PHILADELPHUS. 11—1. (Myrti.) [From phileo, to love, adelphos, a. brother. This name 
was first given to the Gahum or bed-straw, because by its roughness it attached itself to 
what was near.] 
inodo'rus, (scentless syringa, w, J. T2,) leaves acuminate, oval, entire; divis- 
ions of the calyx acute ; style undivided, longer than the stamens ; stigmas 
4, oblong; flowers large. S. 
corona^rius, (mock-orange, false syringa, w. J. P?.) styles distinct; leaves 
ovate, sub-dentate. Ex, 
PHLEUM. 3—2. (GraminecB.) 
praten"se, (timothy grass, J. %. and cJ^.) spike cylindric, calyx mucronate- 
awned ; keel ciliate ; awn shorter than the calyx ; culm erect. Introduced. 
2-3 f. 
PHLOX. 5—1, iPolemonece,.') [A Greek word signifying flame, from the bright colour of the 
flowers of some of its species.] 
panicuWta, (smooth-stem lichnidia, r. w. J. %.') glabrous, erect ; leaves lan- 
ceolate, narrowing gradually, flat ; margins rough ; corymbs panicled; di- 
visions of the corolla rounded ; calyx awned. Cultivated.' 2-3 f. 
sidjula'ta, (mountain pink, r. M. %,.) csespitose, white-pubescent • leaves linear- 
