NESAEA SALICIFOLIA (_syn Heimia salicifolia_).--Mexico, 1821. This can only be styled as half hardy, but with wall protection it forms a pretty bush often fully a yard in height. T...
NEVIUSA ALABAMENSIS.--Alabama Snow Wreath. Alabama, 1879. This is a rare American shrub, with leaves reminding one of those of the Nine Bark, Neillia opulifolia, and the flowers, w...
NUTTALLIA CERASIFORMIS.--Osoberry. California, 1848. This shrub is of great value on account of the flowers being produced in the early weeks of the year, and when flowers are few...
OLEARIA HAASTII.--New Zealand, 1872. This Composite shrub is only hardy in the milder parts of England and Ireland. It is of stiff, dwarf growth, rarely growing more than 4 feet hi...
ONONIS ARVENSIS.--Restharrow. A native undershrub of very variable size, according to the position in which it is found growing. It creeps along the ground, the shoots sending out...
OSMANTHUS AQUIFOLIUM ILLICIFOLIUS.--Holly-leaved Osmanthus. Japan. This is a handsome evergreen shrub, with Holly-like leaves, and not very conspicuous greenish-white flowers. It i...
OSTRYA CARPINIFOLIA (_syn O. vulgaris_).--Common Hop Hornbeam. South Europe, 1724. A much-branched, round-headed tree, with cordate-ovate, acuminate leaves. Both this and the follo...
OXYDENDRUM ARBOREUM (_syn Andromeda arborea_).--Sorrel-tree. Eastern United States, 1752. Unfortunately this species is not often found under cultivation, being unsuitable generall...
OZOTHAMNUS ROSMARINIFOLIUS.--Australia, 1827. A pretty little Australian Composite, forming a dense, twiggy shrub, with narrow, Rosemary-like leaves, and small, whitish, Aster-like...
PAEONIA MOUTAN.--Moutan Paeony, or Chinese Tree Paeony. China and Japan, 1789. A beautiful shrubby species introduced from China about one hundred years ago. The first of the kind...
PALIURUS ACULEATUS (_syn P. australis_).--Christ's Thorn, or Garden Thorn. Mediterranean region, 1596. A densely-branched, spiny shrub, with small leaves, and not very showy, yello...
PARROTIA PERSICA.--Persia, 1848. Well known for the lovely autumnal tints displayed by the foliage when dying off. But for the flowers, too, it is well worthy of culture, the crims...
PASSIFLORA CAERULEA.--Passion Flower. Brazil and Peru, 1699. Though not perfectly hardy, yet this handsome climbing plant, if cut down to the ground, usually shoots up freely again...
PAULOWNIA IMPERIALIS.--Japan, 1840. This is a handsome, fast-growing tree, and one that is particularly valuable for its ample foliage, and distinct and showy flowers. Though perfe...
PERIPLOCA GRAECA.--Poison Vine. South Eastern Europe, and Orient, 1597. A tall, climbing shrub, with small, ovate-lanceolate leaves, and clusters of curious purplish-brown, green-t...
PERNETTYA MUCRONATA (_syn Arbutus mucronata_).--Prickly Heath. Magellan, 1828. This is a dwarf-growing, wiry shrub, with narrow, stiff leaves, and bears an abundance of white, bell...
PHILADELPHUS CORONARIUS.--Mock Orange, or Syringa. South Europe, 1596. A well-known and valuable garden shrub, of from 6 feet to 10 feet high, with ovate and serrulated leaves, and...
P. ANGUSTIFOLIA (narrow-leaved Phillyrea), P. ilicifolia (Holly-leaved Phillyrea), P. salicifolia (Willow-leaved Phillyrea), P. buxifolia (Box-leaved Phillyrea), and P. ligustrifol...
PHLOMIS FRUTICOSA.--Jerusalem Sage. Mediterranean region, 1596. This is a neat-growing shrubby plant, with ovate acute leaves, that are covered with a yellowish down. From the axil...
PHOTINIA JAPONICA (_syn Eriobotrya japonica_).--Loquat, Japan Medlar, or Japan Quince. Japan, 1787. This is chiefly remarkable for its handsome foliage, the leaves being oblong of...
PHYLODOCE TAXIFOLIA (_syns P. caerulea_ and _Menziesia caerulea_).--An almost extinct native species, having crowded linear leaves, and lilac-blue flowers. It is only of value for...
PIERIS FLORIBUNDA (_syns Andromeda floribunda_ and _Leucothoe floribunda_).--United States, 1812. Few perfectly hardy shrubs are more beautiful than this, with its pure white Lily-...
PIPTANTHUS NEPALENSIS (_syn Baptisia nepalensis_).--Evergreen Laburnum. Temperate Himalaya, 1821. A handsome, half-hardy shrub, of often fully 10 feet high, with trifoliolate, ever...
PITTOSPORUM TOBIRA.--Japan, 1804. This forms a neat, evergreen shrub, with deep green, leathery leaves, and clusters of white, fragrant flowers, each about an inch in diameter. It...
PLAGIANTHUS LYALLI, a native of New Zealand (1871), and a member of the Mallow family, is a free-flowering and beautiful shrub, but one that cannot be recommended for general plant...
POLYGALA CHAMAEBUXUS.--Bastard Box. A neat little shrubby plant, with small ovate, coriaceous leaves, and fragrant yellow and cream flowers. P. chamaebuxus purpureus differs in bea...
POTENTILLA FRUTICOSA.--Northern Hemisphere (Britain). An indigenous shrub that grows about a yard high, with pinnate leaves and golden flowers. It is a most persistent blooming pla...
PRUNUS AMYGDALUS (_syn Amygdalus communis_).--Common Almond. Barbary, 1548. Whether by a suburban roadside, or even in the heart of the crowded city, the Almond seems quite at home...
PTELEA TRIFOLIATA.--Hop Tree, or Swamp Dogwood. North America, 1704. A small-growing tree, with trifoliolate, yellowish-green leaves placed on long footstalks, and inconspicuous gr...
PUNICA GRANATUM.--Pomegranate. For planting against a southern-facing wall this pretty shrub is well suited, but it is not sufficiently hardy for the colder parts of the country. F...