6 feet high, and increases rapidly by underground suckers. The
species is quite hardy.

C. TARTARICA (_syn C. siberica_).--Siberia, 1824. This has much
brighter coloured bark, and is of neater and dwarfer habit, than the
typical C. alba. It is a very beautiful and valuable shrub, of which
there is a variegated leaved form.

COROKIA.

COROKIA COTONEASTER.--New Zealand, 1876. A curious, dwarf-growing
shrub, with small, bright yellow, starry flowers produced in June. The
hardiness of the shrub is rather doubtful.

CORONILLA.

CORONILLA EMERUS.--Scorpion Senna. France, 1596. This shrub, a native
of the middle and southern parts of Europe, forms an elegant loose bush
about 5 feet high, with smooth, pinnate, sub-evergreen leaves, and
Pea-shaped flowers, that are reddish in the bud state, but bright
yellow when fully expanded. It is an elegant plant, and on account of
its bearing hard cutting back, is well suited for ornamental hedge
formation; but however used the effect is good, the distinct foliage
and showy flowers making it a general favourite with planters. It will
thrive in very poor soil, but prefers a light rich loam.

CORYLOPSIS.

CORYLOPSIS HIMALAYANA.--E. Himalayas, 1879. This is a stronger growing
species than C. pauciflora and C. spicata, with large leaves averaging
4 inches long, that are light green above and silky on the under sides.
The parallel veins of the leaves are very pronounced, while the
leaf-stalks, as indeed the young twigs too, are covered with a hairy
pubescence.

C. PAUCIFLORA is readily distinguished from the former by its more
slender growth, smaller leaves, and fewer flowered spikes. Flowers
primrose-yellow.

C. SPICATA.--Japan, 1864. This Japanese shrub is of very distinct
appearance, having leaves like those of our common Hazel, and drooping
spikes of showy-yellowish, fragrant flowers that are produced before
the leaves. There is a variegated form in cultivation.

The various species of Corylopsis are very ornamental garden plants,
and to be recommended, on account of their early flowering, for
prominent positions in the shrubbery or by the woodland walk. Light,
rich loam seems to suit them well.

CORYLUS.

CORYLUS AVELLANA PURPUREA.--Purple Hazel. This has large leaves of a
rich purple colour, resembling those of the purple Beech, and is a very
distinct plant for the shrubbery border. Should be cut down annually if
large leaves are desired.

C. COLURNA.--Constant