as Hogg,
a very free-flowering and welcome form; H. hortensis mandschurica, and
H. hortensis stellata flore-pleno, with partially double flowers, are
worthy of attention.

H. PANICULATA.--Japan, 1874. This is one of the most distinct species,
in which the flower-heads are elongated, not flat, as in most other
species, and from which the finest form in cultivation has been
obtained. This is H. paniculata grandiflora, in which the flowers are
sterile and pure white, forming large panicles often a foot in length.
It is a magnificent variety, and, being perfectly hardy, should be
extensively planted for ornament. The flowers are produced in late
summer, but remain in good form for fully two months, dying off a rich
reddish hue.

H. QUERCIFOLIA.--Oak-leaved Hydrangea. Florida, 1803. This species has
neatly lobed leaves, and terminal panicles of pinky-white, but partially
barren, flowers.

H. SCANDENS.--Climbing Hydrangea. Japan, 1879. This is not very hardy,
but with the protection of a sunny wall it grows freely.

The Hydrangeas require a rich, loamy soil, and, unless in maritime
districts, a warm and sheltered situation. They are readily propagated
by means of cuttings.

HYMENANTHERA.

HYMENANTHERA CRASSIFOLIA.--A curious New Zealand shrub with rigid
ashy-coloured branches, and small leathery leaves. The flowers are
violet-like in colour, but by no means conspicuous. The small white
berries which succeed the flowers are, in autumn, particularly
attractive, and very ornamental. It is perfectly hardy and of free
growth in light peaty earth.

HYPERICUM.

HYPERICUM ANDROSAEMUM.--Tutsan, or Sweet Amber. Europe (Britain). A
pretty native species, growing about 2 feet high, with ovate leaves
having glandular dots and terminal clustered cymes of yellow flowers.

H. AUREUM.--South Carolina and Georgia, 1882. This soon forms a neat and
handsome plant. The flowers are unusually large, and remarkable for the
tufts of golden-yellow stamens with which they are furnished.

H. CALYCINUM.--Aaron's Beard, or Rose of Sharon. South-east Europe. This
is a well-known native species of shrubby growth, bearing large yellow
flowers from 3 inches to 4 inches in diameter. It is a prostrate plant,
with coriaceous glossy leaves with small pellucid dots, and of great
value for planting in the shade.

H. ELATUM is a spreading species from North America (1762), growing to
fully 4 feet in height, and bearing terminal corymbs of large, b