ENCYCLOPZDIA OF GARDENING: 
down. Repot annually, Propagate by spores sown on surface of 
shallow pan or box filled with tne sandy peat, covered with pane of 
glass & placed in temp. 65° to 75°; division of roots in March or April. 
Hoe SPECIES: P. albo-squamatum (Syn. Phymatodes albo-squamatum), 
Da aya; chnoodes (Syn. Goniophlebium chnoodes), W. Indies; heracleum (Syn. 
rynaria Heracleum), Java; Lingua jen. Nipholobus Lingua), Manchuria; loriceum 
latipes (Syn. P. Catherine), W. Indies; Meyenianum (Bear's Paw Fern), Philip- 
pines; musefolium, Malaya; pectinatum, W. Indies; persicxfolium, Malaya; 
Tefractrum, Brazil; sub-auriculatum, Malaya; verrucosum, Philippines. 
GREENHOUSE SPECIES: P. aureum (Syn. Phlebodium aureum), W. Indies; 
Billiardieri (Syn. Phymatodes Billiardieri), Australia; drepanum (Syn. Phegopteris 
drepanum), Madeira; pustulatum (Syn. Phymatodes pustulata), Scented Polypody, 
Australia and New Zealand; P. Schneiderii, a hybrid. 
HARDY SPECIES: P. alpestre (Alpine Polypody), Europe (Britain); Dryo- 
pteris (Oak Fern), Britain, etc.; Dryopteris robertianum (Geranium-scented Poly- 
pody); Phegopteris (Beech Fern), britain, etc.; Phegopteris multitidum, fronds 
finely cut; vulgare (Common Polypody), Britain, ete.; vulgare cambricum (Welsh 
Polypody), and several other varieties as cristatum, multindo-cristatum, etc. 
Polypody (Polypodium vulgare).—See Polypodium, 
Polystichum.—See Aspidium. 
Pomegranate tree (Punica Granatum).—See Punica, 
Pontederia (Pickerel Weed). — Ord. Pontederiacexr. Hardy 
aquatic perennials. First introduced 1579. 3 
CULTURE: Soil, rich:loam. Position, shallow ponds or tanks, con- 
taining water, 6 to 12in.indepth. Plant, Oct., Nov., March, or April. 
Propagate by division of roots any time in spring. 
Pest a CULTIVATED: P. cordata, blue, white and green, summer, 2 ft., N. 
Pontic Daphne (Daphne pontica).—See Daphne. 
Pope’s-head (Melocactus communis).—See Melocactus, 
Poplar.—See Populus. 
Poppy.—See Papaver. 
Poppy Anemone (Anemone coronaria).—See Anemone, 
Poppy Mallow.—See Callichroé. 
Populus (Aspen-tree; Abele-tree; Poplar). — Ord. Salicacea. 
Hardy deciduous trees. Orn. foliage. Flowers, catkin-shaped; March 
& April. Leaves, roundish, lobed, toothed, green, whitish beneath. 
Wood, soft, yellow, or white; used for toy-making, spade handles, etc. 
Average price per cubic foot, 6d, to 8d. Weight of timber per cubic 
foot, 30 lb.; number of cubic feet per ton, 74. 
CULTURE: Soil, ordinary moist. Position, margins of ponds, 
lakes, rivers, moist shrubberies or woods. P. deltoidea and N. nigra 
yramidalis, good trees for forming screens in town or suburban gar- 
ie. Plant, Oct. to Feb. For screens, ee 4to6ft. apart. Prune, 
Nov. to Feb. Dry soils not suitable. verage price per 100 of one- 
year-old trees 3s.; two-year-old 10s. to 15s. Propagate by seeds sown 
} in. deep in ordinary soil in moist border in autumn; cuttings of firm 
shoots, 8in. long, inserted in ordinary soil outdoors in Oct. or Nov.; 
layering shoots in Oct.; suckers, Oct. to Feb.; weeping kinds by graft- 
ing on comonm poplars in March. 
SPECIES CULTIVATED: P. alba ((White Poplar or Abele), 60 to 100 ft., Europa 
(Britain), N. Asia, etc.; balsamifera (Balsam Poplar), 60 to 70 ft., N. America; 
canescens (Gray Poplar), 70 to 80 ft., Britain; deltoidea (Syn. Canadensis), 
Cotton Wood, 80 to 100 ft., N. America; deltoidea erecta (Necklace Poplar), 80 to 
100 ft.; nigra (Black Poplar), 50 to 60 ft., Europe; nigra pyramidalis (Lombardy 
Poplar), 60 to 80 ft.; tremula (Aspen), 50 to 80 ft., Europe (Britain), N. Asia. 
Portlandia. — Ord. Rubiaceex. Stove evergreen flowering 
shrubs. First introduced 1775. 
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