t. One at least of the species
blooms naturally much earlier, namely _O. stellulata_ (_O. gunniana_),
and very pretty it is under cover and with its daisy-like blossom. To be
seen at their best, grow them altogether in pots and give the protection
of a cool house in winter.

TREE PAEONIES.--The magnificent varieties of the Tree Paeony that have
appeared in recent years have led to a great increase in their culture.
Though hardy in many places, their young leaves and flowers are
frequently injured by late frosts, hence they are often flowered under
glass. In this way they make a gorgeous display in the greenhouse, which
is sufficiently warm for them in all stages. If forcing is attempted
they are quickly spoilt. They must be potted in good loamy soil, and are
most satisfactory when grown altogether in pots, as many of the long
fleshy roots will be injured in digging up established plants.

PERNETTYA MUCRONATA.--Though grown chiefly for its ornamental berries,
neat little bushes are very pleasing in the greenhouse when thickly
studded with little white lily-of-the-valley-like flowers, so pretty
against the dark-green colouring of the leaves. The treatment
recommended for Kalmias is suitable for the Pernettyas. The fruits are
very charming.

PHILADELPHUS (Mock Orange).--This in its several forms may be lifted in
the autumn and flowered well the following spring, not early, as the
forcing must be very gentle. Even then the perfume of _P. coronarius_ is
too powerful to be pleasant in a confined space. This objection cannot,
however, be urged against M. Lemoine's hybrids between this species and
the pretty little Mexican _P. microphyllus_, which has a fragrance like
that of ripe apples. These newer hybrids--_Avalanche_, _Boule d'Argent_,
_Gerbe de Neige_, _Manteau d'Hermine_, _Mont Blanc_, and _Lemoinei_--are
all worth a place either in the open ground or for flowering in pots.

PRUNUS.--Several classes that were at one time considered as separate
genera are now included in the genus Prunus, which was formerly limited
to the Plum family. Now the Cherries, Almonds, and Peaches are only
sections of the genus Prunus, as explained elsewhere in this book, but
as they are better known under their respective names it will be wiser
to refer to them thus. The Cherries (_Cerasus_) have been added to
considerably of recent years, several varieties having come from Japan,
mostly of _P. (Cerasus) pseudo-cerasus_. These, which include s