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408 results
  • Lathyrus vernus (L.)Bernh. Papilionaceae previously Orobus vernus L. (Linnaeus, 1753) Spring vetchling. Distribution: Europe to Siberia. The seeds of several Lathyrus species are toxic, and when eaten cause a condition called lathyrism. The chemical diaminoproprionic acid in the seeds causes paralysis, spinal cord damage, aortic aneurysm, due to poisoning of mitochondria causing cell death. Occurs where food crops are contaminated by Lathyrus plants or where it is eaten as a 'famine food' when no other food is available. It is the Orobus sylvaticus purpureus vernus of Bauhin (1671) and Orobus sylvaticus angustifolius of Parkinson (1640) - who records that country folk had no uses for it. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Cucurbita maxima 'Golden Hubbard'
  • Tellima grandiflora (Pursh)Lindl. Saxifragaceae Distribution: Western North America from Alaska to California. The Native American Skagit tribe from Washington State, used it to improve appetite. The Nitinaht used it to stop having dreams of sexual intercourse with the dead (Moerman, 1998), Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Geum rivale 'Leonard's Variety'
  • Apium graveolens (Wild celery)
  • Viburnum japonicum Spreng. Caprifoliaceae Distribution: Evergreen Shrub. Distribution: Japan and Taiwan. No medicinal uses. The fruit is a 'famine food' eaten when all else fails. As other seeds/fruits of Viburnum species are listed as poisonous, and none are listed as 'edible', one can assume that the seeds/fruits of V. japonicum are also toxic. It does not appear vulnerable to pests or molluscs which may be due to irioid glycosides that are present in this genus produced as a defence against herbivores, fungi and bacteria. They have a bitter taste. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Valeriana pyrenaica L. Valerianaceae Distribution: Pyrenees. It has no medical use. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Magnolia stellata (Siebold & Zuch.) Maxim. Magnoliaceae. Star magnolia. Small flowering tree. Distribution: Japan. Named for the French botanist and physician, Pierre Magnol (1638-1715), Professor of Botany and Director of the Royal Botanic Gardens at Montpelier. Charles Plumier (1646-1704) named a tree on Martinique after him (Magnolia) and the name was continued by Linnaeus (1753). No medicinal use. This is a very ancient genus of flowering plants. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Sanguisorba officinalis 'Tanna'
  • Datura stramonium (Thornapple). Also called Jimsonweed
  • Asarum caudatum Lindl. Aristolochiaceae. British Columbia wild ginger. Asarum is the Latin name for wild ginger
  • Lobelia cardinalis L Campanulaceae Cardinal lobelia Distribution: Americas, Colombia to south-eastern Canada. The genus was named after Matthias de L’Obel or Lobel, (1538–1616), Flemish botanist and physician to James I of England, author of the great herbal Plantarum seu Stirpium Historia (1576). Lobeline, a chemical from the plant has nicotine like actions and for a while lobeline was used to help people withdraw from smoking, but was found to be ineffective. It was introduced from Virginia to John Parkinson in England by John Newton (1580-1647) a surgeon of Colyton (aka Colliton), Devon, who travelled to Virginia. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Chelidonium majus (Greater celandine)
  • Paeonia suffruticosa 'Bai Yu'
  • Petasites paradoxus Baumg. Asteraceae Alpine Butterbur. Herbaceous Perennial. Distribution: Temperate Northern hemisphere. It contains pyrrolizidine alkaloids, which are hepatotoxic and cause liver cancers. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Podophyllum peltatum (American mandrake). Also known as 'May apple'.
  • Rosmarinus officinalis L. Lamiaceae Rosemary. Woody perennial. Distribution: Mediterranean. Quincy (1718) commended the flowers for epilepsy, apoplexy, palsies, uterine obstruction, jaundice, gout, and syringed into the ear with warm water for dislodging wax. It is licensed for use in Traditional Herbal Medicines in the UK (UK Medicines and Healthcare Products Regulatory Agency (MHRA)). Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Prunus mume Siebold & Zucc. Rosaceae Chinese Plum, Japanese Apricot. Distribution: Eastern Asia. The fruit is used to flavour alcohol and used as a digestive to improve appetite. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Eucomis comosa (Houtt.)H.R.Wehrh. Hyacinthaceae Pineapple flower. From the Greek eu comis meaning 'good hair' referring to the tuft of leaves on top of the flowers. Comosa being Latin for 'with a tuft' referring to the same thing. Used in South African 'muthi' medicine. Enemas of Eucomis autumnalis are used in Africa to treat low backache, to aid postoperative recovery and to speed the healing of fractures. Decoctions are taken for the treatment of everything from hangovers to syphilis. The active ingredients include homisoflavones, which have anti-inflammatory and antispasmodic activity (van Wyk et al, 2000) Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Ornithogalum umbellatum L. Hyacinthaceae Star of Bethlehem, Grass lily. Distribution: Central Europe, SW Asia, NW Africa. All parts are poisonous, especially the bulbs. The toxin is a cardiac glycoside with effects similar to digoxin, vomiting, cardiac irregularities and death in humans and livestock. Only used for decoration by Native Americans (it is a non-native plant that has escaped into the wild from cultivation) and called Sleepydick (Moerman, 1998). One of its toxins is Convallotoxin, also present in Lily of the Valley, Convallaria majalis. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Saponaria officinalis 'Alba Plena'
  • 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.
  • Datura stramonium (Thornapple). Also called Jimsonweed
  • Crocosmia x crocosmiiflora 'George Davidson'
  • Borago officinalis L. Boraginaceae. Borage. officinalis indicates it was used in the 'offices' - the consulting clinics - of medieval monks. Distribution: Europe. Culpeper: “... comforts the heart, cheers the spirit, drives away sadness and melancholy, they are rather laxative than binding
  • Veronicastrum virginicum 'Pink Glow'
  • Colchicum autumnale L., Colchicaceae. Autumn crocus, meadow saffron, naked ladies. Distribution: Europe. Extremely toxic, containing colchicine which is effective in small doses in treating gout. It inhibits mitosis so is of interest in cancer treatment. It is used to treat Familial Mediterranean fever. It induces polyploidy in plant protocorms for the production of tetraploid forms which have bigger flowers and seeds. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Cedronella canariensis (L.)Webb & Berthel. Basionym Dracocephalum canariense. Lamiaceae. Canary balm, Balm-of-Gilead, Canary Island tea. It smells slightly resinous of cedar, hence the diminutive name Cedronella. Perennial herb. Distribution: Canary Islands. True Balm-of-Gilead is the sap of the poplar, Populus candicans. It was drunk as a tea, and the aroma was believed to relieve colds. No medicinal use. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Melilotus officinalis (Common melilot)
  • Rosa nitida Willd. Rosaceae. Shining rose. Distribution: North-eastern North America. Nitida is Latin for shining, referring to the shiny leaves. The seed heads contain vitamin C. Photographed in the Medicinal Garden of the Royal College of Physicians, London.