ENCYCLOPHDIA OF GARDENING. 
SPEOIES CULTIVATED: P. azureus, blue, Aug., 1 ft., N. America; barbatus 
(Syn. Ohelone barbata), scarlet, summer, 3 ft., U. States; OCobxa, purple and 
white, Aug., 1 ft., U. States; confertus carulea-purpureus, purple and blue, 1 ft., 
summer, Rocky Mountains; glaber, purple, summer, 1 ft., U. States; gentianoides, 
summer, 3 ft., Mexico} Hartwegii, scarlet, summer, 2 ft., Mexico; Menziesii, lilac, 
red and purple, June, 6 in., N.W. America. The kinds grown so largely in 
gardens were originally derived from hybrids between P. Cobxa and P. Hart 
wegii. 
Peony (Peonia officinalis)—See Pzonia. 
Peperomia (Pepper-Elder).—Ord. Piperacee. Stove herbaceous 
co 3 ereeping & erect; orn. foliage. First introduced 1815. 
eaves, roundish or egg-shaped; green, variegated with white. 
CULTURE: Compost, equal parts fibrous loam & peat with half a 
art sand. Pot, March or April. Position, small well-drained pots 
for erect species, shallow pans or beds for creeping species. Shade from 
sun. Water moderately in winter, freely in summer. Syringe daily, 
April to Sept. Temp., April to Sept. 60° to 75°; Sept. to April 55° 
to 65°. Propagate by cuttings of shoots or single joints with leaf 
attached inserted in sandy peat & plunged in bottom heat in temp. 
65° to 75° in apart e 
SPECIES OULTIVATED: P. argyreia, leaves green and grey, 8. America; mar- 
morata, leaves, green and white, Brazil; metallica, leaves green, Peru; nummu- 
lariefolia, round green leaves; Sandersii, leaves, green and white. 
Pepper Elder.—See Peperomia. 
Peppermint (Mentha piperita).—See Mentha. 
Peppermint-scented Geranium (Pelargonium tomen- 
tosum).—See Pelargonium. 
Pepper-plant.—See Piper. 
Perennial Candytuft.—See Iberis. 
Perennial Flax (Linum perenne).—See Linum. 
Perennial Honesty (Lunaria rediviva)—See Lunaria. 
Perennial Sun-flower (Helianthus multiflorus).—See Helian- 
thus. 
Pereskia (Barbados Gooseberry).—Ord. Cactacew. Stove succu- 
lent perennials. First introduced 1696. 
CULTURE: Compost, equal parts loam, peat & leaf-mould, one- 
fourth sand. Pot, March. Position, small, well-drained pots in light, 
dry part of stove, or in beds with shoots trained to dry wall. Water 
moderately Sept. to April, freely afterwards. Temp., Sept. to March 
50° to 60°; March to Sept. 65° to 75°. P. aculeata and P. Bleo grown 
chiefly for stocks for grafting epiphyllums on. Propagate by cuttings 
of stem inserted in 2-in. pots fil a with sandy soil & faved on a light, 
dry shelf in temp. 65° to 75° in spring. Allow one slroat only to grow 
for forming a stock, & train this to a stake fixed in soil until ed 
enough, then pratt. 
wi CULTIVATED: P. aculeata, 5 to 7 ft., W. Indies; Bleo, 8 to 10 ft., 
exico, 
Perilla.—Ord. Labiate. Half-hardy orn.-foliaged annual. First 
introduced 1770. Leaves, egg-shaped, pointed; green or dark bronzy 
purple, with fimbriated edges. 
CULTURE: Sow seeds 1-16 in. deep in shallow boxes or pans faled 
with ordinary light soil placed in temp. of 65° to 75° in Feb. or March. 
Transplant seedlings when three leaves have formed singly into 2in. 
pete. or 2in. apart in shallow boxes. Keep in temp. 55° to 65° till 
ay, then transfer to cold frame; gradually harden off & plant out- 
oe a June. Adapted for masses in borders or for lines in, or edgings 
to, beds. 
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