P. VIRGINIANA (_syn Cerasus virginiana_) and P. SEROTINA (North American
Bird Cherries) are worthy species, with long clusters of flowers
resembling those of our native Bird Cherry. They are large-growing
species, and, particularly the latter, are finding favour with
cultivators in this country on account of their bold and ornamental
appearance.


PTELEA.

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 greenish flowers. The leaves, when
bruised, emit an odour resembling Hops. P. trifoliata variegata is one
of the handsomest of golden-leaved trees, and is well worthy of
extensive planting. It is preferable in leaf colouring to the golden
Elder. Perfectly hardy.


PUNICA.

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. Frequently in the more favoured
parts of the country it reaches a height of 14 feet, with a
branch-spread of nearly as much, and is then, when in full flower, an
object of general admiration and of the greatest beauty. The flowers are
of a rich, bright scarlet colour, and well set off by the glossy, dark
green leaves. P. Granatum rubra flore-pleno is a decidedly ornamental