THE SHRUBBERY. 



789 



flow rapidly. They all require a deep sandy 

 loam. 



Periploca. — Deciduous twiners of rapid 

 growth, propagated by layers, and also by cut- 

 tings set in sandy soil, and protected by a hand- 

 glass ; they succeed well in any good garden- 

 soil. 



Pernettya. — Evergreen shrubs of low growth, 

 adapted to the front of shrubberies ; propagated 

 by seed, cuttings, and layers ; succeeding best 

 in a peaty or light fibrous soil. 



Pkiladelphus. — Deciduous free - flowering 

 shrubs, of moderate growth ; propagated by 

 suckers, and dividing the plant early in spring, 

 and occasionally by cuttings. When grown as 

 standards trained to a single stem, they become 

 ornaments to the lawn. They succeed in any 

 moderately good soil. 



Phillyrea. — Evergreen shrubs of moderate 

 growth, exceedingly handsome, although their 

 flowers are inconspicuous. Too seldom seen in 

 our gardens. Propagated by layering in autumn, 

 by cuttings placed under a hand-glass in spring, 

 and by seed, when it can be procured, which 

 should be buried in sand for a season before 

 sowing. 



Phlomis. — The evergreen shrubby section of 

 this genus are propagated by cuttings, planted 

 in common soil, in a shady place. Most of them 

 are free bloomers. 



Photinia. — Sufficiently hardy for standing the 

 winter in the south of England : requires, for 

 the most part, the shelter of a wall in Scotland. 

 They are, in general, propagated by being 

 budded on the hawthorn. Thrive in any ordi- 

 nary soil. 



Piptanthus. — A deciduous shrub, or nearly so, 

 requiring the protection of a wall, which it 

 richly deserves on account of the abundance of 

 its yellow flowers early in spring. Propagated 

 by seeds, which ripen in most places, also by 

 cuttings of the ripened side-shoots. It may also 

 be increased by layering in autumn, and by 

 cuttings of the roots at the same season. 

 Thrives in any moderately good soil. 



Platanus. — Deciduous trees of great utility 

 in the decoration of grounds, and well suited for 

 city gardens, squares, &c. Propagated by seeds 

 sown in spring, and also by cuttings put in both 

 in spring and autumn. The nursery practice 

 generally is to propagate them by layers — an ex- 

 peditious but reprehensible practice. Eequire 

 a deep rich loamy soil. 



Portugal laurel — vide Cerasus. 



Poteniilla. — The shrubby section are low- 

 growing profuse- flowering plants. Propagated 

 by cuttings of the ripened wood in autumn, also 

 by cuttings of the young wood during sum- 

 mer, set in sand, and covered with a hand-glass. 



Prinos. — Deciduous low-growing shrubs, with 

 the exception of P. lucidus, which is evergreen. 

 Propagated by seeds and layers, requiring a 

 peat-and-loam soil. 



Prunus— Deciduous low-growing trees, pro- 

 ducing abundance of white blossom in April, 

 being amongst the earliest flowering plants met 

 with in shrubberies. Propagated by seeds and 

 suckers. The finer sorts are increased by bud- 

 ding or grafting on stocks of the commoner kinds 

 VOL. II. 



raised from seeds. They all prefer a deep loamy 

 soil, and if calcareous so much the better. 



Pterocarya. — A deciduous tree allied to wal- 

 nut, upon which it is grafted for multiplying the 

 stock. The young shoots are sometimes laid, 

 but they seldom make so good plants. In cold 

 localities a poor soil is best for it, to check the 

 luxuriance of its growth and insure the ripen- 

 ing of the wood ; in warm places a richer and 

 deeper soil may be accorded it. 



Punica. — Deciduous trees, requiring in all 

 parts of Britain the shelter of a wall. Propa- 

 gated by cuttings of the roots and ripened shoots, 

 and also by layering. The double-flowering va- 

 riety is grafted on the single. A light rich soil 

 is requisite. 



PursJiia. — An evergreen shrub of moderate 

 growth. Propagated by cuttings of the young 

 wood in May, set in sand, and covered with a 

 bell-glass. Imported seed is sometimes procured, 

 which should be treated as recommended for 

 roses (vide p. 759). It thrives best in a poor 

 sandy soil. An interesting shrub, seldom found 

 in our gardens. 



Pyrus. — Deciduous trees producing abun- 

 dance of snow-white blossom early in the season. 

 The common sorts are propagated by seeds, and 

 form stocks on which the rarer and better sorts 

 are budded or grafted. Layering is also had 

 recourse to both for obtaining stocks and multi- 

 plying some of the kinds. They all prosper in 

 a good loamy soil. 



Quercus. — Amongst the oak family there are 

 many extremely interesting trees, both evergreen 

 and deciduous. Many of the sorts are propa- 

 gated by seeds either ripened in Britain or im- 

 ported from their native country. The rarer, 

 and those of which seeds cannot be procured, 

 are increased by being grafted on those that are 

 so originated. The acorns should be sown as 

 soon as they fall from the tree, or partially dried 

 and kept packed in sand till spring, when they 

 should be sown in good loamy soil in rows, and 

 covered to the depth of half an inch. In import- 

 ing acorns, they should be partially dried in the 

 sun before packing, and the driest part of the 

 ship should be secured. Sometimes they are 

 packed in dry soil, and should they partially 

 vegetate during the voyage, they should be care- 

 fully unpacked and planted immediately on their 

 arrival, shading the embryo shoot for a few days 

 from direct light. The evergreen species and 

 varieties are exceedingly ornamental in the 

 dressed grounds ; and the foliage of some of the 

 American species, becoming highly coloured in 

 autumn, produces enlivening tints beyond any 

 of our hardy trees whatever. 



Rhus. — Deciduous trees and shrubs. Propa- 

 gated by seeds, by cuttings of the roots and 

 shoots, and also by layering. They succeed 

 well in any good garden-soil. 



Ribis. — Deciduous shrubs of moderate growth, 

 and flowering early in spring. Propagated by 

 seeds, by cuttings of the ripened shoots in spring 

 and autumn, planted in a somewhat shaded 

 border in the open ground. They all succeed 

 in any good garden- soil. 



Robinia. — Deciduous fine-flowering trees. The 

 common sorts, such as the locust-tree, are pro- 



5 ii 



