PRU 177 
strobiles ovate, terminal, scarcely longer than the leaves. The bark 
is used in tanning leather. 
16é—10. PISUM. 
Exotic. 
Saii’’vum, (pea. p. w. J. ) petioles terete; stipules round and ere- 
nate at the base; peduncles many flowered. Var. wmbellatum, (bo- 
quet pea,) has the stipules 4-cleft acute. Var. quadratum, (quadrate 
pea,) fruit ash colour, 4-sided. Var. hwmile, (dwarf pea,) stem erect, 
not climbing; leafets roundish. 
3—2. POA. 
Praten’’sis, (meadow grass. O. J. |) panicle diffuse; upper leaves 
much shorter than the smooth sheaths; florets acute, 5 nerved, 
webbed at the base; stipule short truncate; root creeping. 2—3. f. 
12-1. PODOPHYLLUM. (From pous, a foot, and phullon, a leaf.) 
Pelia’tum, (wild mandrake, may-apple. O. w. M. 21) stem terminated 
with 2 peltate palmate leaves; flower single, inserted in the fork, 
formed by the petioles of the leaves. Sometimes the plant is three 
leaved, and sometimes the flower is inserted on the side of one of 
the petioles. 1—2. f. 
16—6. POLYGALA. (From polus, much, and gula, milk.) 
Paucifo'lia, (flowering wintergreen. O. r. M. 2) small, large flow- 
ered; stem simple, erect, naked below; leaves ovate, acute, gla- 
brous near the top of the stem; flowers crested, terminal, about in 
threes. 3—4. 1. 
20—8. POPULUS. 
Exotic. 
Dilata’ta, (lombardy poplar, Italian poplar, Ap. n) leaves glabrous 
both sides, acuminate, serrate, deltoid, the breadth equal to, or ex- 
ceeding the length; branches erect, close to the stem. 
l1i—13. POTENTILLA. (From potentia, power.) 
Leaves digitate in fives, rarely in sevens. 
Canaden’sis, (common five finger. O.y. M. 21) procumbent, sub-ra- 
mose, whitish silky ; stipules ovate, gashed; leaves wedge obovate, 
gash toothed ; stem ascending, and creeping hirsute; peduncles so- 
litary, elongated; divisions of the calyx lance-linear, petals orbicu- 
lar, sub-entire, of the length of the calyx. 
13—1. PRUNELLA. 
Vulga’ris, var. pennsylvanica, (heal-all, self-heal. O.J. 2,) leaves peti- 
oled, oblong-ovate, toothed at the base; lips of the calyx unequal; 
upper one truncate, awned; stem ascending. 6—12. i. 
