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Buckthorn (common) | | Name : | Buckthorn (common) | | Synonyms : | Highwaythorn. Waythorn. Hartsthorn. Ramsthorn. | | Family : | Rhamnaceae | | Parts Used : | Berries. | | Description : | The main stem is erect, the bark smooth, of a blackish-brown colour, on the twigs ash-coloured. The smaller branches generally terminate in a stout thorn or spine, hence the ordinary name of Buckthorn, and the older names by which the shrub has been known: Highwaythorn and Waythorn. Gerard calls it Ram or Hart's Thorn. The leaves grow in small bunches on footstalks, mostly opposite towards the base of the young shoots, though more generally alternate towards the apex. They are eggshaped and toothed on the edges, the younger ones with a kind of soft down. In the axils of the more closely arranged leaves, developed from the wood of the preceding year, are dense branches of small greenish-yellow flowers, about one-fifth inch across, which are followed by globular berries about the size of a pea, black and shining when ripe, and each containing four hard, dark-brown seeds.
Goats, sheep and horses browse on this shrub, but cows refuse it. Its blossoms are very grateful to bees. | | Constituents : | Buckthorn berry juice contains Rhamnocathartin (which is yellowand uncrystallizable), Rhamnin, a peculiar tannic acid, sugar and gum. The fresh juice is coloured red by acids and yellow by alkalies, and has a bitter taste and nauseous odour. Its specific gravity should be between 1.035 and 1.070, but it is seldom sold pure. The ripe berries yield on expression 40 to 50 percent of juice of a green colour, which on keeping turns, however, gradually to a reddish or purplish brown colour, on account of the acidification of the saccharine and mucilaginous matter. | | Uses : | Laxative and cathartic.
Buckthorn was well known to the AngloSaxons and is mentioned as Hartsthorn or Waythorn in their medical writings and glossaries dating before the Norman Conquest. The Welsh physicians of the thirteenth century prescribed the juice of the fruit of Buckthorn boiled with honey as an aperient drink.
The medicinal use of the berries was familiar to all the writers on botany and materia medica of the sixteenth century, though Dodoens in his Herbal wrote: 'They be not meat to be administered but to the young and lusty people of the country which do set more store of their money than their lives.'
Until late in the nineteenth century, syrup of Buckthorn ranked, however, among favourite rustic remedies as a purgative for children, prepared by boiling the juice with pimento and ginger and adding sugar, but its action was so severe that, as time went on, the medicine was discarded. It first appeared in the London Pharmacopceia of 1650, where, to disguise the bitter taste of the raw juice, it was aromatized by means of aniseed, cinnamon, mastic and nutmeg. It was still official in the British Pharmacopoeia of 1867, but is no longer so, being regarded as a medicine more fit for animals than human beings, and it is now employed almost exclusively in veterinary practice, being commonly prescribed for dogs, with equal parts of castor oil as an occasional purgative.
The flesh of birds eating the berries is stated to be purgative.
There used to be a superstition that the Crown of Thorns was made of Buckthorn. |
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