Cichorium Intybus.—­This is a hardy herbaceous plant producing blue flowers in July.  It will grow in any soil and needs no special treatment.  Seeds may be sown either in autumn or spring.  Height, 2 ft.

Cimcifuga.—­These hardy herbaceous plants will flourish in any good garden soil and are easily raised from seed, or they may be increased by dividing the roots.  Various species produce their flowers from May to September.  Height, 1 ft. to 3 ft.

Cinerarias.—­These grow well in a soil composed of equal parts of rich loam, leaf-mould, and thoroughly rotted horse-dung, liberally mixed with sharp sand.  They are increased by seed, cuttings, or off-sets.  The seed should be sown as soon as it is ripe and covered with the lightest layer of the finest soil; or it may be sown during March on a slight hotbed.  Keep the young plants shaded from the sun, and as soon as they can be handled put them into 3-in. pots.  Return them to the hotbed and keep them shaded till established, then gradually harden them off, and towards the end of May they may be planted in the open, choosing a sheltered situation.  The first flower-stem should be cut out close to the bottom, but the side-shoots may either be reduced or not.  At the end of September place them in a cool frame to bloom during the following month.  They require to be well supplied with manure water.  As soon as the plants have done flowering, cut them down, and keep them well supplied with water, and in March shake them out of their pots and plant each sucker separately.  Other sowings may be made in April and May.  To obtain cuttings, when the plants have flowered cut them down, and when they have again grown large enough take the cuttings and plant them in pots filled with the above compost, putting a layer of silver sand on the top.  When the cuttings have made shoots 3 in. long, pinch off the tops to make the plants grow bushy.  Re-pot when the roots are well grown, but before they get matted, and give occasionally a little liquid manure.  Keep a good look-out for green fly, and as soon as this nuisance appears fumigate the plants with tobacco paper.  An excess of fumigation is injurious.  Those that have bloomed in pots may be planted in the north border of the garden in July, where they may shed their seed, from which early plants will be produced.  They may also be increased by off-sets.  If the old plants are cut down and kept well watered they will throw up suckers, which may be separated and potted off into thumb pots, transplanting into larger ones when required.  They must always be kept shaded from the sun.  A cool frame suits them in summer, and being nearly hardy, should never be subjected to a forcing temperature, sufficient heat to keep away frost and damp being all that is necessary.

Cinnamon Plant.—­This is a stove or greenhouse plant, and requires a loam and peat soil.  Cuttings of the ripe wood strike freely.

Cissus Orientalis.—­Useful climbing plants which delight in a light, rich soil.  They are increased by cuttings planted under glass and kept in a gentle, moist heat.