as they proceed, and is usually
found on dry sandy banks. The flowers when at their best are very
ornamental, being bright pink, and with the standard streaked with a
deeper shade. They are abundantly produced, and render the plant very
conspicuous during the summer and autumn months. When planted on an old
wall, and allowed to roam at will, the Restharrow is, perhaps, seen to
best advantage.

OSMANTHUS.

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 is a very desirable shrub, of
which there are varieties named O.A. ilicifolius argenteo-variegatus,
O.A. ilicifolius aureo-variegatus, and O.A. ilicifolius nanus, the
names of which will be sufficient to define their characters.

O.A. ILICIFOLIUS MYRTIFOLIUS.--Myrtle-leaved Osmanthus. A very distinct
and beautiful shrub, with unarmed leaves. It is of dwarf, compact
growth, with small, sharply-pointed leaves, and inconspicuous flowers.
For the front line of a shrubbery this is an invaluable shrub, its
pretty leaves and neat twiggy habit making it a favourite with planters.
The variety rotundifolius is seldom seen in cultivation, but being
distinct in foliage from any of the others is to be recommended. They
grow freely in any good garden soil, but all the better if a little peat
is added at the time of planting.

OSTRYA.

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 following species, by reason of the
resemblance between their female catkins and those of the Hop, and
between their leaves and those of the Hornbeam, have acquired the very
descriptive name of Hop Hornbeam. This is a large-growing tree,
specimens in various parts of the country ranging in height from 50 feet
to 60 feet.

O. VIRGINICA.--Virginian Hop Hornbeam. Eastern United States, 1692.
Resembles the latter, but is of smaller growth, rarely exceeding 40 feet
in height. They grow fairly well in almost any class of soil, and on
account of the long and showy catkins are well worthy of cultivation.

OXYDENDRUM.

OXYDENDRUM ARBOREUM (_syn Andromeda arborea_).--Sorrel-tree. Eastern
United States, 1752. Unfortunately this species is not often found under
cultivation, being unsuitable generally for our climate. In some
instances, however, it ha