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  • Article

Sacred cows and nutritional purity in India

Apoorva Sripathi explores the complex reasons behind India’s recent boom in all things dairy – beginning with a 1970s Western food-aid programme.

  • Article

Hunting lost plants in botanical collections

A bark specimen at Kew recalls the story of a South American man who harvested the most potent source of the only effective malaria treatment available in the late 1800s. Killed for his work and forgotten by history, Manuel Mamani was a victim of the colonial juggernaut.

  • Book extract

Ayurveda: Knowledge for long life

The story of medicine in India is rich and complex. Aarathi Prasad investigates how it came to be this way.

  • Article

The healing power of the physic garden

Having experienced the healing power of plants and gardens, Iona Glen goes in search of present-day “physic gardens” and their origins in history.

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  • Aconitum carmichaelii Debeaux. Ranunculaceae. Chinese aconite, Chinese wolfsbane, Carmichael's monkshood. Herbaceous perennial. Distribution C. to W. China to N. America. Named for Dr J.R. Carmichael (d. 1877), English physician, plant collector and Protestant missionary from 1862-1877 in Guangdong and Shandong, China initially in Canton. He aided Francis Forbes to collect plants for Kew. Aconitum plants are so poisonous that Theophrastus states that death was the punishment for possessing them. Aconitine is the poison and was used - from Aconitum ferox - in the 'curry murder' in London in 2009. It causes respiratory paralysis, bradycardia (slowing of the pulse), cardiac arrhythmias, tingling, sweating, gastric cramps, diarrhoea and death, both by ingestion and by absorption through the mucous membranes and the skin. Despite this it is widely used in Chinese herbal medicine. It is a restricted herbal medicine which can only be dispensed by a herbal practitioner for external use following a one-to-one consultation, or by prescription from a registered doctor or dentist (UK Medicines and Healthcare Products Regulatory Agency (MHRA)). Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Catharanthus roseus (L.)G.Don Apocynaceae. Madagascar Periwinkle Distribution: Madagascar. It is the source of vincristine and vinblastine, which impair cell multiplication by interfering with microtubule assembly, causing metaphase arrest and are effective medications for leukaemias, lymphomas and some solid tumours. The mortality from childhood leukaemia fell from 100% to 30% once it was introduced - not a drug that could ethically be tested by double-blind trials. These chemicals were initially discovered by investigators in 1958 who were looking for cures for diabetes so tested this plant which was being used in the West Indies to reduce blood sugar levels. There are 70 different alkaloids present in this plant, and some - catharanthine, leurosine sulphate, lochnerine, tetrahydroalstonine, vindoline and vindolinine - lower blood sugar levels. However, the toxicity of this plant is such that this is not a plant to try at home for diabetic management. The vincristine content of the plant is 0.0003%, so two kilograms of leaf are required to produce sufficient vincristine for a single course of treatment for a child (6gm). Fortunately it is a vigorous weed and easy to grow in the tropics. Artificial synthesis has now been achieved. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Senna corymbosa (Lam.)H.S.Irwin&Barneby Caesalpinaceae. Argentine Senna. Distribution: Argentine (other species from Europe). This beautiful shrub that flowers from midsummer until the frosts of winter, is the source of one of the best known of all herbal medicines – Senokot (and senna pods and senna tea), introduced to European medicine (as Senna alexandrina from Egypt) by the Arabians. Every part of the plant contains anthraquinones which, if taken internally, act as a powerful laxative to treat constipation by stimulating the nerve cells of the large bowel. Gerard (1633) notes ‘it is a singular purging medicine’ with over a page on its uses. When used regularly the nerves to the large bowel may be destroyed, leaving a permanently dilated large bowel that never functions properly again. This is a plant which causes the condition it treats to become permanent. Additionally, with prolonged use, the lining of the bowel turns black, serum potassium levels may fall, resulting in cardiac irregularities and sometimes death. Coma, neuropathy and hepatitis have also been reported. It is advertised on television (the actor involved is seen to be depressed and bloated until she takes Senokot, after which she is happy - Hippocrates would have attributed this antidepressant effect to the plant's ability to purge her of the black melancholic humour present in her bowel motions). It is available without prescription or health warning against long-term use. What do you think? Lyte (1578) recommends it strongly for depression, but one might claim to be cured rather than take it again. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Senna corymbosa (Lam.)H.S.Irwin&Barneby Caesalpinaceae. Argentine Senna. Distribution: Argentine (other species from Europe). This beautiful shrub that flowers from midsummer until the frosts of winter, is the source of one of the best known of all herbal medicines – Senokot (and senna pods and senna tea), introduced to European medicine (as Senna alexandrina from Egypt) by the Arabians. Every part of the plant contains anthraquinones which, if taken internally, act as a powerful laxative to treat constipation by stimulating the nerve cells of the large bowel. Gerard (1633) notes ‘it is a singular purging medicine’ with over a page on its uses. When used regularly the nerves to the large bowel may be destroyed, leaving a permanently dilated large bowel that never functions properly again. This is a plant which causes the condition it treats to become permanent. Additionally, with prolonged use, the lining of the bowel turns black, serum potassium levels may fall, resulting in cardiac irregularities and sometimes death. Coma, neuropathy and hepatitis have also been reported. It is advertised on television (the actor involved is seen to be depressed and bloated until she takes Senokot, after which she is happy - Hippocrates would have attributed this antidepressant effect to the plant's ability to purge her of the black melancholic humour present in her bowel motions). It is available without prescription or health warning against long-term use. What do you think? Lyte (1578) recommends it strongly for depression, but one might claim to be cured rather than take it again. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Salvia coahuilensis Fernald Lamiaceae Coahuila Sage. Perennial shrub. Distribution: Mexico. Most of the historical medicinal literature is on common sage, Salvia officinalis. The name Salvia meaning 'healthy'. Elizabeth Blackwell (1737) wrote that it had "... all the noble Properties of the other hot Plants more especially for the Head, Memory, Eyes, and all Paralytical Affections. In short, 'tis a Plant endu'd with so many and wonderful Properties, as that the assiduous use of it is said to render Men Immortal" with which Hans Sloane agreed. Its health giving properties were recorded in the aphorisms of the School of Salerno (fl 9-13th century) - quoted in the Decameron [c.1350, translated: Why should man die when Salvia grows in the Garden']. Some salvias, such as Salvia divinorum contain hallucinogenic compounds. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Euphorbia milii Des Moul. Euphorbiaceae. Crown of Thorns - so called because of its very spiny stems. Distribution: Madagascar. The latex contains a copper-containing amine oxidase, a lectin, lipase, peroxidase, and a diamine oxidase. In vitro the latex is synergistic with ketoconazole against Candida albicans (thrush). All Euphorbia have a toxic white latex, and in Europe this has been used as a folk remedy to treat warts. It can cause skin allergies and the smoke from burning them is toxic. the genus named for Euphorbus (fl. circa 10 BC – 20 AD), the Greek physician to the Berber King Juba II (c. 50 BC – 23 AD) of Numidia, Euphorbia milii is one of the tropical spurges, with fierce, cactus-like spines, grown as a house plant. The sap of spurges is used in folk medicine for treating warts (not very effective), and, historically, as a purgative - the word spurge being derived from the French word for purgation. The sap (probably dried) was administered inside a fig because it is so corrosive that it would otherwise burn the mouth and oesophagus – a technique used today, rather more subtly, with ‘enteric coated’ medications. The sap contains a potential anti-leukaemic chemical, lasiodoplin, and is also used in drainage ditches to kill the snails which carry the parasitic trematode which causes fasciolaris. It does not kill the fish. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Salvia nemorosa L. Lamiaceae Woodland sage. Balkan clary Distribution: Central Europe, Western Asia. Most of the historical medicinal literature is on common sage, Salvia officinalis. The name Salvia meaning 'healthy'. Elizabeth Blackwell (1737) wrote that it had "... all the noble Properties of the other hot Plants more especially for the Head, Memory, Eyes, and all Paralytical Affections. In short, 'tis a Plant endu'd with so many and wonderful Properties, as that the assiduous use of it is said to render Men Immortal" with which Hans Sloane agreed. Linnaeus (1782) also: 'Timor, Languor, Leucorrhoea, Senectus [fear, tiredness, white vaginal discharge, old age]'. Its health giving and immortality conferring properties were recorded in the aphorisms of the School of Salerno (fl 9-13th century) - quoted in the Decameron [c.1350, translated: Why should man die when Salvia grows in the Garden']. Some salvias, such as Salvia divinorum contain hallucinogenic compounds. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Zantedeschia aethiopica (L)Spreng. Calla lily, Arum lily. Half hardy annual. Distribution: South Africa. The genus name commemorates Giovanni Zantedeschi (1773-1846) an Italian physician and botanist. Born in Molina he studied medicine in Verona and Padua. He corresponded with the German botanist, Kurt Sprengel, who named the genus Zantedeschia in his honour in 1826, separating it from Calla, where, as C. aethiopica, it had been previously described by Linnaeus. He had broad interests, including the effect of different parts of the spectrum of light on plant growth, reporting in 1843, that red, orange and yellow light are heliotropically inactive. The botanic museum in Molina is dedicated to his memory. Aethiopica, merely means 'African'. The leaves are used as a warm poultice for headaches in ‘muthi’ medicine. It has become an invasive weed in parts of Australia. It was introduced, as a greenhouse plant, to Europe in the mid-17th century, where the long lasting flowers are popular in flower arranging and for weddings and funerals – a curious combination (Oakeley, 2012). Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Hepatica nobilis Mill. Ranunculaceae. Liverwort - not to be confused with the lichen of the same name. Distribution: North America. Liverwort (‘liver plant’): discontinued herbal medicine for disorders of the liver. The name and the use to which the Liverworts have been put medicinally is suggested, according to the doctrine of signatures, by the shape of the leaves which are three-lobed, like the liver. It is little used in modern herbalism but was employed in treating disorders of the liver and gall bladder, indigestion etc. It is highly toxic. Hepatica acutiloba was widely used for liver disorders in the 1880s, with up to 200,000 kilos of leaves being harvested per annum to make liver tonics - which eventually caused jaundice. Gerard (1633) calls it Hepaticum trifolium, Noble Liverwort, Golden Trefoile and herbe Trinity and writes: 'It is reported to be good against weakness of the liver which proceedeth from a hot cause, for it cooleth and strengtheneth it not a little. ' He adds ' Baptista Sardus[a Piedmontese physician fl. 1500] commendeth it and writeth that the chiefe vertue is in the root
  • Hepatica nobilis Mill. Ranunculaceae. Liverwort - not to be confused with the lichen of the same name. Distribution: North America. Liverwort (‘liver plant’): discontinued herbal medicine for disorders of the liver. The name and the use to which the Liverworts have been put medicinally is suggested, according to the doctrine of signatures, by the shape of the leaves which are three-lobed, like the liver. It is little used in modern herbalism but was employed in treating disorders of the liver and gall bladder, indigestion etc. It is highly toxic. Hepatica acutiloba was widely used for liver disorders in the 1880s, with up to 200,000 kilos of leaves being harvested per annum to make liver tonics - which eventually caused jaundice. Gerard (1633) calls it Hepaticum trifolium, Noble Liverwort, Golden Trefoile and herbe Trinity and writes: 'It is reported to be good against weakness of the liver which proceedeth from a hot cause, for it cooleth and strengtheneth it not a little. ' He adds ' Baptista Sardus [a Piedmontese physician fl. 1500] commendeth it and writeth that the chiefe vertue is in the root
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