Poivrea

Six species. Stove evergreen climbers. Young cuttings. Sandy loam and peat.

Polanisia

Five species. Hardy annuals. Seed. Sheltered, light rich loam.

Polemonium

Twelve species. Hardy herbaceous. Division. Light loam.

Polianthes

Tuberose. Two species. Green-house bulbs. Bulbs imported. Sandy loam and leaf-mould.

Polybotrya

Three species. Stove ferns. Division and seed. Sandy peat and turf.

Polygala

Forty-four species. Herbaceous, shrubby, and annual. All hardy or green-house, except the stove annuals, P.paniculata and P.umbeliata. Division, cuttings or seed. Sandy peat and a little loam.

Polygonatum

Thirteen species. Hardy herbaceous. Seed and division. Light rich loam.

Polygonum

Forty-eight species. Chiefly hardy herbaceous or annual plants, some being aquatics and trailers. A few require the shelter of the greenhouse. Seed and division. Light rich loam.

Polypodium

Sixty-six species. Chiefly stove ferns. Division and seed. Light loam and peat.

Polypody

Polypodium.

Polypteris

Polypteris integrifolia. Hardy annual. Seed. Light rich loam.

Polyspora

Polyspora axillaris. Stove evergreen shrub. Unripe cuttings. Light loam and peat.

Polystachya

Seven species. Stove epiphytes. Division. Wood and moss.

Pomaderris

Sixteen species. Green-house evergreen shrubs. Young cuttings. Sandy loam and peat.

Pomax

Pomax hirta. Green-house evergreen shrub. Cuttings. Sandy peat and loam.

Pombalia

Pombalia ituba. Stove herbaceous. Seed and young cuttings. Sandy loam and peat.

Pomegranate

Punica.

Pompion

See Gourd.

Ponceletia

Ponceletia sprengeiloides.

Green-house evergreen shrub. Young cuttings. Sandy peat.

Pongamia

Four species. Stove evergreen shrubs. Cuttings. Sandy loam and peat.

Pontedera

Seven species. Stove aquatics, except the hardy P. caerulea. Division. Rich light loam in water.

Ponthieva

Two species. Stove orchids. Division. Sandy loam and peat.

Poplar

Populus.

Poppy

Papaver.

Populus

Poplar. Fifteen species, and many varieties. Hardy deciduous trees. Cuttings and layers. Light loam, near flowing water.

Porana

Porana volubilis. Stove evergreen twiner. Seed. Loam and peat.