all or arch covering,
thriving to perfection in rich soil that is well-drained. It is readily
propagated from cuttings.

PERNETTYA.

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-shaped flowers. It is a capital
wind screen, and may be used to advantage on the exposed side of
rockwork or flower beds, or as an ornamental shrub by the pond or lake
side. The small dark-green leaves, the tiny white flowers, and great
abundance of deep purple berries in winter, are all points that are in
favour of the shrub for extended cultivation. The pretty, pinky shoots,
too, help to make the plant attractive even in mid-winter. Propagation
by layers or seed is readily brought about. To grow this shrub to
perfection, peaty soil or decayed vegetable matter will be found most
suitable. There is a narrow-leaved form named P. mucronata angustifolia,
and another on which the name of P. mucronata speciosa has been
bestowed.

There are many beautiful-berried forms of the Pernettya, but as their
flowers are small can hardly be included in our list.

PHILADELPHUS.

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 pretty racemes of white or
yellowish-white, fragrant flowers. P. coronarius aureo-variegatus is one
of the numerous forms of this shrub, having brightly-tinted, golden
foliage, but the flowers are in no way superior to those of the parent.
It is, if only for the foliage, an extremely pretty and distinct
variety. P. coronarius argenteo-variegatus has silvery-tinted leaves; P.
coronarius flore-pleno, full double flowers; and P. coronarius Keteleeri
flore-pleno is the best double-flowered form in cultivation.

P. GORDONIANUS, an American species (1839), is a well-known and
beautiful shrub, in which the flowers are usually double the size of
those of the common species, and which are not produced till July, while
those of P. coronarius appear in early May.

P. GRANDIFLORUS (_syns P. floribundus, P. latifolius_ and _P.
speciosus_).--Southern United States, 1811. This has rotundate,
irregularly-toothed leaves, and large white, sweetly-scented flowers
produced in clusters. This forms a stout bush 10 feet high, and as much
through. There are two varieties, P. grandiflorus