forms of this
Bottle-brush, one bearing pale-yellow flowers and the other crimson.
Others are _C. lanceolatus_, carmine-flowered, and _C. speciosus_,
scarlet-flowered. These grow well as bushes, specimens of the
first-named being sometimes 10 feet in height and as much in diameter.
There is much confusion between this genus and _Metrosideros
floribunda_. Callistemons are to be found in many gardens.

CAMELLIA RETICULATA.--This is hardy, but rarely flowers satisfactorily
in the open except in the south-west, where it is grown both against
walls and as a bush plant. It is by far the finest of the Camellias,
bearing lovely, pink, semi-double flowers 6 inches in diameter, with
bright-yellow, spreading stamens.

CANDOLLEA TETRANDRA.--Australia. An evergreen bush bearing clear-yellow,
cup-shaped flowers somewhat resembling Sun Roses, but of finer texture.
Tresco.

CANTUA BUXIFOLIA.--Peru. An evergreen shrub, bearing in corymbs at the
end of the branches pale-red trumpet-flowers something after the style
of _Fuchsia corymbiflora_. Tresco.

CARPENTERIA CALIFORNICA.--A well-known evergreen shrub in the
south-west, bearing fragrant, white, yellow-centred flowers. In some
gardens it suffers from browning of the leaves, but this is apparently
not the effect of cold winds or frost, as often the most exposed plants
are the least affected and the most sheltered are in the worst plight.
The finest specimen known to Mr. Fitzherbert is about 8 feet high and as
much through; it is growing near Teignmouth. It may be considered fairly
hardy since it has been grown in the open in Scotland.

CARYOPTERIS MASTACANTHUS.--Chili. A most valuable, much-branched
evergreen shrub growing to a height of 4 feet or more, bearing
lavender-blue clusters of flowers in October. There is also a white
form. The type is common. This is also happy farther north.

CASSINIA LEPTOPHYLLA.--New Zealand. A small evergreen shrub, bearing
white flower-heads. Tregothnan.

CEANOTHUS.--California and Mexico. Many species and varieties are grown
both as bushes, in which form they soon make small trees, and trained
against walls. Of the early-flowering varieties _C. veitchianus_ is the
brightest coloured, and of the autumn-blooming, azureus section, Gloire
de Versailles is the favourite. Common in most gardens.

CITHAREXYLOM QUADRANGULARE.--West Indies. The Fiddle-wood. Bears white,
fragrant flowers. There is a fine specimen at Abbotsbury. Dorset.

CITRUS TRIFOLI