Pomegranate - Notes

See Punica.

Populus - Notes

Poplar. See Chapters 8. and 9. P. alba (Abele) is the white Poplar; P. nigra, the black Poplar; P. nigra pyramidalis, the Lombardy Poplar; P. tremula, the Aspen; P. balsamifera, the Balsam Poplar; P. canescens, the Grey Poplar; P. deltoides (syns. canadensis, cordata and monilifera) the Necklace Poplar. They are hardy, cheap and useful trees, thriving in most soils; alba and tremula like a deep moist soil; there is a form of tremula called purpurea, the young growth of which is purple.

Portugal Laurel - Notes

See Laurel.

Potentilla - Notes

Most of the Cinquefoils are herbaceous, but fruticosa, height up to eight feet, with yellow flowers in summer, is a deciduous shrub, and so is the hybrid Friedrichsenii, which has pale yellow flowers and is rather dwarfer than fruticosa. Glabra is a form of the latter. Ordinary soil. There are several Alpine species, suitable for the rock garden.

Prinos- Notes

Glaber is the same as Ilex glabra. Ordinary soil.

Privet - Notes

See Ligustrum, and Chapters 14. and 24.

Prumnopitys - Notes

A small genus of Conifers, of which the best known is elegans (syns. Stachycarpus andina andPodocarpus andina), the Plum Fir. Spicata, the Black Pine, is less hardy. They are trees growing up to fifty feet high in deep loamy soil.