508 results
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Opium poppy (Papaver somniferum): flowering and fruiting plants. Colour process print, c. 1924.
Date: [1924]Reference: 25597i- Digital Images
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Eranthis hyemalis Salisb. Ranunculaceae Winter Aconite Distribution: Europe. The reason it was called Winter aconite and linked to Aconitum napellus as being just as poisonous is because plants were classified according to leaf shape in the 16th century. L'Obel's Stirpium adversaria nova (1571) and Plantarum seu stirpium historia (1576) (with a full page illustration on page 384 showing Eranthis and Aconitum together) along with the knowledge that related plants have similar medical properties caused the belief that Eranthis are as poisonous as Aconitum. They are both in Ranunculaceae and while Eranthis (like all Ranunculaceae)is toxic if eaten, it does not contain the same chemicals as Aconitum. Caesalpino (Ekphrasis, 1616) pointed out the error in classifying according to leaf shape and recommended flower shape. It contains pharmacologically interesting chemicals such as khellin, also present in Ammi visnaga. This is a vasodilator but quite toxic, but can be converted into khellin analogues such as sodium cromoglicate – used as a prophylaxis against asthma attacks – and amiodarone which has anti-arrhythmia actions so is used for atrial fibrillation and other arrhythmias. It is endangered and protected in the wild (Croatia) because of over-collecting for horticulture. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
Dr Henry Oakeley- Digital Images
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Eranthis hyemalis Salisb. Ranunculaceae Winter Aconite Distribution: Europe. The reason it was called Winter aconite and linked to Aconitum napellus as being just as poisonous is because plants were classified according to leaf shape in the 16th century. L'Obel's 'Stirpium adversaria nova' published in 1571 and 'Plantarum seu stirpium historia' published 1576 (with a full page illustration on page 384 showing Eranthis and Aconitum together) along with the knowledge that related plants have similar medical properties caused the belief that Eranthis are as poisonous as Aconitum. They are both in Ranunculaceae and while Eranthis (like all Ranunculaceae) is toxic if eaten, it does not contain the same chemicals as Aconitum. Caesalpino (Ekphrasis, 1616) pointed out the error in classifying according to leaf shape and recommended flower shape. It contains pharmacologically interesting chemicals such as khellin, also present in Ammi visnaga. This is a vasodilator but quite toxic, which can be converted into khellin analogues such as sodium cromoglicate – used as a prophylaxis against asthma attacks – and amiodarone which has anti-arrhythmia actions so is used for atrial fibrillation and other arrhythmias. It is endangered and protected in the wild (Croatia) because of over-collecting for horticulture. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
Dr Henry Oakeley- Digital Images
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Atropa belladonna L. Solanaceae. Deadly nightshade. Dwale. Morella, Solatrum, Hound's berries, Uva lupina, Cucubalus, Solanum lethale. Atropa derives from Atropos the oldest of the three Fates of Greek mythology who cut the thread of Life (her sisters Clotho and Lachesis spun and measured the thread, respectively). belladonna, literally, means 'beautiful lady' and was the Italian name for it. Folklore has it that Italian ladies put drops from the plant or the fruits in their eyes to make themselves doe-eyed, myopic and beautiful. However, this is not supported by the 16th and 17th century literature, where no mention is ever made of dilated pupils (or any of the effects of parasympathetic blockade). Tournefort (1719) says 'The Italians named this plant Belladonna, which in their language signifies a beautiful woman, because the ladies use it much in the composition of their Fucus [rouge or deceit or cosmetic] or face paint.' Parkinson says that the Italian ladies use the distilled juice as a fucus '... peradventure [perhaps] to take away their high colour and make them looke paler.' I think it more likely that they absorbed atropine through their skin and were slightly 'stoned' and disinhibited, which made them beautiful ladies in the eyes of Italian males. Distribution: Europe, North Africa, western Asia. Culpeper (1650) writes: 'Solanum. Nightshade: very cold and dry, binding … dangerous given inwardly … outwardly it helps the shingles, St Antonie's Fire [erysipelas] and other hot inflammation.' Most of the 16th, 17th and 18th century herbals recommend it topically for breast cancers. Poisonous plants were regarded as 'cold' plants as an excess of them caused death and the body became cold. They were regarded as opposing the hot humour which kept us warm and alive. Poultices of Belladonna leaves are still recommended for muscle strain in cyclists, by herbalists. Gerard (1633) writes that it: 'causeth sleep, troubleth the mind, bringeth madnesse if a few of the berries be inwardly taken, but if more be taken they also kill...'. He was also aware that the alkaloids could be absorbed through the skin for he notes that a poultice of the leaves applied to the forehead, induces sleep, and relieves headache. The whole plant contains the anticholinergic alkaloid atropine, which blocks the peripheral actions of acetylcholine in the parasympathetic nervous system. Atropine is a racemic mixture of d- and l- hyoscyamine. Atropine, dropped into the eyes, blocks the acetylcholine receptors of the pupil so it no longer constricts on exposure to bright light - so enabling an ophthalmologist to examine the retina with an ophthalmoscope. Atropine speeds up the heart rate, reduces salivation and sweating, reduces gut motility, inhibits the vertigo of sea sickness, and is used to block the acetylcholine receptors to prevent the effects of organophosphorous and other nerve gas poisons. It is still has important uses in medicine. Atropine poisoning takes three or for days to wear off, and the hallucinations experienced by its use are described as unpleasant. We have to be content with 'madness', 'frenzie' and 'idle and vain imaginations' in the early herbals to describe the hallucinations of atropine and related alkaloids as the word 'hallucination' in the sense of a perception for which there is no external stimulus, was not used in English until 1646 (Sir T. Browne, 1646). It is a restricted herbal medicine which can only be sold in premises which are registered pharmacies and by or under the supervision of a pharmacist (UK Medicines and Healthcare Products Regulatory Agency (MHRA)). Photographed in the Medicinal Garden of the Royal College of Physicians, London.
Dr Henry Oakeley- Books
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Inorganic plant poisons and stimulants / by Winifred E. Brenchley.
Brenchley, Winifred Elsie, 1883-Date: 1914- Books
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A mechanical account of poisons in several essays / By Richard Mead.
Mead, Richard, 1673-1754.Date: 1702- Digital Images
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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.
Dr Henry Oakeley- Digital Images
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Helleborus x hybridus Hort. Ex Vilmorin Ranunculaceae. A range of hybrids from Helleborus orientalis the Oriental hellebore. Distribution: Europe through to the Caucasus. All very poisonous. Culpeper (1650) says: “The roots (boiled in vinegar) ... be an admirable remedy against inveterate scabs, itch and leprosy, the same helps the toothache, being held in the mouth
Dr Henry Oakeley- Books
- Online
A mechanical account of poisons in several essays / By Richard Mead.
Mead, Richard, 1673-1754.Date: 1736- Digital Images
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Adonis vernalis L. Ranunculaceae. Pheasant's eye, the golden flowered spring (or vernal) Adonis, is named in memory of Adonis, the Greek god of plants, who disappeared into the earth in the winter and reappeared in the spring. The flowers were said to have sprung from his blood when he was gored to death by a wild boar, but this plant must have been the blood red Adonis aestivalis, the summer Adonis. Distribution: Eurasia to Spain and Sweden. Gerard (1633) recommends it for renal stone and intestinal colic. Lewis & Elvin Lewis (2003) note it is poisonous, containing cardiac glycosides (adonitoxin, cymarin, K-strophanthin) and flavonoids. The UK Medicines and Healthcare Products Regulatory Agency (MHRA)) bans its use for ingestion 'no dose permitted' but allow it to be prescribed by a herbal practitioner on a one-to-one consultation. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
Dr Henry Oakeley- Books
Handleiding der vergiftleer : ten gebruike bij het onderwijs aan 's Rijks Kweekschool voor Militaire Geneeskundigen. [Bijzondere vergiftleer] / door A. W. M. van Hasselt.
Hasselt, A. W. M. van (Alexander Willem Michiel), 1814?-1902Date: [1851-?]- Pictures
A lamb-shaped vegetable called Tartarian lamb or Scythian lamb, reputed to allow no other plants to grow near it. Aquatint by J. Halfpenny, 1787.
Date: [1787]Reference: 2496789i- Books
Toxic constituents of plant foodstuffs / edited by Irvin E. Liener.
Date: 1969- Books
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Moyens de remédier aux poisons végétaux : a ceux qui sont produits par les substances métalliques, et au venin des animaux / par B.G. Sage.
Sage, Balthazar Georges, 1740-1824.Date: 1811- Books
The non-bacillar nature of abrus-poison : with observations on its chemical and physiological properties / by C.J.H. Warden and L.A. Waddell.
Warden, C. J. H. (Charles James Hislop), 1851-1900.Date: 1884- Digital Images
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Helleborus x hybridus Hort. Ex Vilmorin Ranunculaceae. A range of hybrids from Helleborus orientalis the Oriental hellebore. Distribution: Europe through to the Caucasus. All very poisonous. Culpeper (1650) says: “The roots (boiled in vinegar) ... be an admirable remedy against inveterate scabs, itch and leprosy, the same helps the toothache, being held in the mouth: dropped into the ears, helpeth deafness coming of melancholy and noises in the ears
Dr Henry Oakeley- Books
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A mechanical account of poisons in several essays / By Richard Mead.
Mead, Richard, 1673-1754.Date: 1747- Books
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The physiological actions of dajaksch, an arrow poison used in Borneo / by Peter M. Braidwood, M.D.
Braidwood, Peter Murray.Date: 1864- Books
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The nature and origin of the poison of Lotus Arabicus / by Wyndham R. Dunstan and T.A. Henry.
Dunstan, Wyndham R. (Wyndham Rowland), 1861-1949.Date: 1901- Books
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The non-bacillar nature of abrus-poison : with observations on its chemical and physiological properties / by C.J.H. Warden and L.A. Waddell.
Date: 1884- Books
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Note on a toxic substance excreted by the roots of plants / by F. Fletcher.
Fletcher, Frank.Date: 1908- Books
Naturally occurring carcinogens of plant origin : toxicology, pathology, and biochemistry / edited by Iwao Hirono.
Date: 1987- Books
The healing power of plants / University of Oxford Botanic Garden.
Botanic Garden (University of Oxford)Date: [1996]- Ephemera
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Caper spurge (Euphorbia lathyrus. Family: Euphorbiaceae) : Corangil tablets.
Date: [1966]- Pictures
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Chinese lantern (Physalis alkekengi L.): entire flowering and fruiting plant with separate opened calyx and berry. Coloured etching by M. Bouchard, 1774.
Date: [1774]Reference: 16863i