320.  Cannabis sativa.  Hemp.  The Seeds.—­These have some smell of the herb; their taste is unctuous and sweetish; on expression they yield a considerable quantity of insipid oil:  hence they are recommended (boiled in milk, or triturated with water into an emulsion) against coughs, heat of urine, and the like.  They are also said to be useful in incontinence of urine; but experience does not warrant their having any virtues of this kind.

321.  Carthamus tinctorius.  Safflower.  The Seeds.—­These have been celebrated as a cathartic:  they operate very slowly, and for the most part disorder the bowels, especially when given in substance; triturated with aromatic distilled waters, they form an emulsion less offensive, yet inferior in efficacy to more common purgatives.

322.  Centaurea Cyanus.  Blue-bottle.  The Flowers.—­As to their virtues, notwithstanding the present practice expects not any from them, they have been formerly celebrated against the bites of poisonous animals, contagious diseases, palpitations of the heart, and many other distempers.

323.  Centaurea rhapontica.  Greater centaury.  The Root.—­It has a rough somewhat acrid taste, and abounds with a red viscid juice; its rough taste has gained it some esteem as an astringent; its acrimony as an aperient; and its glutinous quality as a vulnerary:  the present practice takes little notice of it in any intention.

324.  Chelidonium majus.  Great celandine.  The Leaves and Juice.—­This is an excellent medicine in the jaundice; it is also good against all obstructions of the viscera, and, if continued a time, will do great service against the scurvy.  The juice also is used successfully for sore eyes, removing warts, &c.  It should be used fresh, for it loses the greatest part of its virtue in drying.

325.  Chenopodium olidum.  Stinking goosefoot.  The Leaves.—­Its smell has gained it the character of an excellent anti-hysteric; and this is the only use it is applied to.  Tournefort recommends a spiritous tincture, others a decoction in water, and others a conserve of the leaves, as of wonderful efficacy in uterine disorders.

326.  Chrysanthemum Leucanthemum.  Ox-eye Daisy.  The Leaves.—­Geoffroy relates that the herb, gathered before the flowers have come forth, and boiled in water, imparts an acrid taste, penetrating and subtile like pepper; and that this decoction is an excellent vulnerary and diuretic.

327.  Cistus ladanifetus.  Gum Cistus.—­The gum labdanum is procured from this shrub, and is its only produce used in medicine.  This is an exudation from the leaves and twigs in the manner of manna, more than of any thing else.  They get it off by drawing a parcel of leather thongs over the shrubs.  It is not much used, but it is a good cephalic.—­Hill’s Herbal, p. 72.