roduces flowers in May and
June. Height, 1 ft.

Corydalis (_Fumitory_).--These low-growing perennials are suitable for
dry positions on rock-work. They are not particular as to soil, and
may be increased by division of roots, while some scatter seed in
abundance. Their flowering period extends over many months. Height, 6
in. to 1 ft.

Cosmea Bipinnata.--A very pretty half-hardy annual which flowers in
July. Sow the seed early in spring on a slight hotbed covered with
glass, and transplant to the flower border at the end of May. Height,
2 ft.

Cosmos.--Pretty plants, the flowers resembling a single Dahlia. They
are mostly hardy, but some need protection. The annuals should
be raised on a hotbed in February and be planted out in May. The
perennials, too, are brought forward in heat. Some flower in June,
others in September. Height, 1 ft. to 3 ft.

Cotoneaster.--Evergreen shrubs which will grow in any soil and are
easily increased by layers. C. Hookeriana attains the dimensions of
small trees, and produces a profusion of white flowers and bright
crimson berries. C. Simonsii is largely used as a hedge. Height, 6 ft.
to 8 ft. C. Rupestris is a small-leaved, prostrate perennial species,
bearing white flowers from May to August, followed by red berries.
Height, 3 in.

Cotyledon Chrysantha (_Umbilicus)._--A choice Alpine succulent which
thrives in a sandy loam, or in well-drained pots of the same soil. It
flowers from May to August, and is multiplied by cuttings, which must
be left to dry for a few days in a sunny place. Flowers are produced
from May to August. Height, 3 in.

Cowslips.--Well-known hardy perennials. These require the same
treatment as Primulas. Plant in a mixture of loam and peat, and divide
as soon as the bloom has died off. Height, 6 in.

Cowslips, Cape.--_See_ "Lachenalia."

Crambe Cordifolia (_Tournefort, or Sea Cabbage_).--This hardy
herbaceous plant is suitable for a wild garden. It likes a good, rich
soil, and is easily increased by seed or division. August is its
flowering period. Height, 3 ft.

Crane's Bill.--_See_ "Geranium Argentium."

Crataegus Pyracantha (_Fire Thorn_).--This hardy, ornamental shrub
will grow in any soil. It should be planted early in spring on a south
or south-west wall, and may be increased by seeds, by budding, or by
grafting. The profuse brilliant orange-coloured berries of the C.
Lelandii (Mespilus) ensures it a place on walls and trellises. A sunny
position give