ENCYCLOPHDIA OF GARDENING. 
Persian Lily (Fritillaria persica).—See Fritillaria. 
Persian Tulip (Tulipa clusiana)—See Tulipa. 
Peruvian Daffodil (Hymenocallis Amances). — See Hymenu 
callis. 
Peruvian Heliotrope (Heliotropium peruvianum). — See 
Heliotropium. 
Peruvian Nasturtium (Tropxzolum tuberosum).—See Tro- 
peolum, : 
Peruvian Swamp Lily (Zephyranthes candida).—_See Zephy- 
ranthes. 
Peruvian Trumpet-flower (Datura suavolens). — See 
Datura. 
Petasites (Winter Heliotrope)—Ord. Composite. Hardy peren- 
nial herbs. Flowering & orn. foliage. Leaves, kidney or heartshaped. 
large, downy beneath, green. 
CULTURE: Soil, ordinary. Position, shrubberies or woodland, par- 
tially shaded borders. Plant, Oct. or Nov. Propagate by division, 
Oct. or Nov. 
apres OULTIVATED: P. fragrans, white, fragrant, Feb., 6 in., Mediterranean 
egion. 
Petrea (Purple Wreath)—Ord. Verbenacex. Stove-flowering 
climber; deciduous. First introduced 1733. 
CULTURE: Compost, equal parts loam, leaf-mould, peat & sand; 
little charcoal. Position, well-drained pot, bed, or border, with shoots 
trained up rafters or trellis in shady part of stove. Pot or plant, Feb. 
or March. Prune slightly, Feb. Water freely, March to Sept., mode- 
rately afterwards. Syringe daily March to Sept. Temp., March to 
Sept. 65° to 75°; Sept. to March 55° to 60°. Propagate by cuttings 
of firm young shoots inserted in sandy soil in well-drained ‘pot under 
bell-glass in temp. 65° fo 75°, epring & summer. 
SPECIES OULTIVATED: P. arborea, violet, blue, summer, 12 ft., Colombia; 
volubilis (Purple Wreath), purple, summer, 12 ft., Trop. America. 
Petty Whin (Genista anglica).—See Genista. 
Petunia.—Ord. Solanacew. Half-hardy herbaceous perennials 
First introduced 1823. 
INDOOR CULTURE: Compost, two parts decayed turfy loam, one 
part well-rotted manure, quarter part silver sand. Position, sunny 
greenhouse or window. Shade only from bright sun. Pot, Feb. to 
June, moderately firm. Size of pots, 3, 5 & 6in. Pinch out point 
of young shoots occasionally in spring to induce bushy growth. Prune 
shoéts of old plants moderately close in Feb. or March. Water mode- 
rately Sept. to April, freely afterwards. No syringing required. Apply 
stimulants to established plants when flower buds form. Train shoots 
to stakes. Suitable liquid manures: 1 oz. nitrate of soda or sulphate 
of ammonia to 1 gallon of water, applied three or four successive times 
only; $02. ae to a gallon of water applied twice a week; one-fourth 
liquid cow, horse, sheep, or deer dung to three-fourths water applied as 
advised for guano. Temp., March to Oct. 55° to 65°; Oct. to March, 
40° to 50°. 
OUTDOOR CULTURE: Soil, ordinary rich. Position, sunny beds, 
borders, vases, or trellises. Plant, June. Lift, Sept., & store in pots 
in greenhouse to furnish cuttings in spring. Water freely in dry 
weather. Place in cold frame in May to harden before planting out. 
Apply stimulants as above. Propagate by seeds sown on surface of a 
compost of equal parts good soil, leaf-mould & sand in a well-drained 
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