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  • Adiantum venustum D.Don Adiantaceae (although placed by some in Pteridaceae). Himalayan maidenhair fern. Small evergreen hardy fern. Distribution: Afghanistan-India. It gains its vernacular name from the wiry black stems that resemble hairs. Adiantum comes from the Greek for 'dry' as the leaflets remain permanently dry. The Cherokee used A. pedatum to make their hair shiny. Henry Lyte (1576), writing on A. capillus-veneris, notes that it restores hair, is an antidote to the bites of mad dogs and venomous beasts
  • Thunbergia alata Sims Acanthaceae. Black-eyed Susan. Tender, perennial herbaceous climbing plant. Distribution: East Africa. Named for Carl Peter (Pehr or Per) Thunberg (1743-1828), doctor, botanist, student of Linnaeus who collected plants in Japan, Sri Lanka and South Africa. He published Flora Japonica (1784)
  • Smyrnium olusatrum L. Apiaceae. Alexanders, Black Lovage, Horse Parsley. Distribution: W & S Europe, Mediterranean. Culpeper (1650) writes: ‘Hipposelinum. Alexanders or Alisanders, provoke urine, expel the afterbirth, provoke urine, help the strangury, expel the wind.’ Culpeper has taken this mainly from Dioscorides’ Materia Medica (circa 100 AD). The genus name is said to derive from Smyrna, a city which was founded by Alexander the Great (although there was one which pre-dated his Smyrna). on the Aegean coast of Anatolia. The species name comes from the Latin olus meaning a pot herb (cooking vegetable) and atrum meaning black, in reference to the seeds. It is described as tasting like a rather bitter, second-class celery. The English name may derive from Alexandria or Alexander the Great. It is rarely used in herbal medicine now. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Cistus incanus ssp creticus Juss. Cistaceae. Rock Rose. Distribution: Crete. Interesting symbiosis with fungus called Tuber melanosporum which increases nutrient absorption for the plant and inhibits growth of other plants in the vicinity. It is a source of the resin ‘labdanum’ (a.k.a. ‘ladanum’) used in perfumes (similar smell to ambergris), as is Cistus ladanifer. It has no medical uses now, and such use was dwindling even in the 18th century. In the 16th century (Henry Lyte’s 1575 translation of Rembert Dodoen’s Cruydeboeck of 1554) its uses were described (directly copied from Dioscorides’ Materia Medica (70AD)) as: ‘Ladanum dronketh with olde wine, stoppeth the laske [periods], and provoketh urine. It is very good against the hardness of the matrix or mother [uterus] layde to in the manner of a pessarie, and it draweth down the secondes or afterbirth, when it is layde upon quicke coles [hot coals], and the fumigation or parfume thereof be received up into the body of women. // The same applied to the head with Myrrhe and oyle of Myrrhe, cureth the scurffe, called Alopecia, and keepeth the heare [hair] from falling of [sic], but whereas it is already fallen away, it will not cause the heare to growe agayne. // ...' and goes on in this vein about its uses for pain in the ears, and removing sores and scars and other things. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Pinus mugo Turra, Pinaceae Mountain pine. Distribution: Mountain regions in south and central Europe. Source of pine cone syrup used in cooking. Pine trees in general have a small edible pine nut in the pine cone, which Lyte (1578) writes are 'good for the lungs, they cleanse the breast, and cause the fleme to be spit out: also they nourish well and engender good blood, and for this cause they are good for such as have the cough.' He wrote that it was used for burns, wounds, dysentery, and as a diuretic. Quincy says of fir (Pinus) cones that they strengthen the genital parts, and increase the quantity of seed, or increase Desire without adding to Ability or Performance. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Plectranthus argentatus S.T.Blake Lamiaceae Silver spurflower. Herbaceous perennial. Distribution: Queensland and New South Wales, Australia. Little is known of its chemical constituents. It does contain many novel diterpenoids in its leaf glands (Alder, A.C. et al, Helvetica Chimica Acta, 2004, 67(6): 1523 – 1530).This genus has had some species from the genus Coleus incorporated into it, and these form a separate clade on phylogenetic analysis. The species in the ‘Coleus’ clade have a higher incidence of medicinal usage, being used to treat digestive, skin, infective and respiratory problems. They contain monoterpenoids, sesquiterpenoids, and diterpenoids. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Eucryphia glutinosa (Poepp. & Endlich.) Baill. Eucryphiaceae. Santo sour cherry. Woodland tree. Distribution: Ancient genus from Gondwanaland. Native of Chile, other species being found in eastern coastal Australia. It is now rare in its habitat, since it was much used as a timber tree. Australian aboriginals have used leatherwood (Eucryphia lucida) as an antiseptic and styptic. A recent investigation by the Australian Government Rural Industries and Development Corporation (B R D’Arcy, 2005) finds that leatherwood honey is rich in phenolic acids that possess some antibacterial and anti-oxidant activity. These natural products have been proposed as preservers of freshness in foodstuffs - a possible alternative to the synthetics currently used.
  • Rhamnus cathartica (Common buckthorn)
  • Argemone mexicana L. Papaveraceae. Mexican poppy
  • Potentilla thurberi 'Monarch's Velvet'
  • Rubus spectabilis 'Olympic Double'
  • Rhododendron yakushuminum 'Grumpy'
  • Opuntia humifusa Raf. Cactaceae Eastern prickly pear, Indian fig. Distribution: Eastern North America. Stearns (1801) reports 'OPUNTIA a species of cactus. The fruit is called the prickly pear. If eaten it turns the urine and milk in women's breast red'. This is likely to be Opuntia robusta. The ripe fruits are reported edible, raw, and the leaf pads also, either raw or cooked. The fine spines, glochids, cause severe skin irritation so should be wiped off or burnt off prior to cooking and eating. Moerman (1998) reports that O. hemifusa was widely used by Native American tribes for wounds, burns, snakebite, warts (fruit), and as a mordant for dyes used on leather. Widely used, with the spines removed, as a famine food, and dried for winter use. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Lilium henryi Baker Liliaceae. Tiger Lily. Distribution: China. This commemorates Dr Augustine Henry (1857–1930) who collected plants in China and Taiwan while working for Britain’s Imperial Customs Service (Oakeley, 2012). Reported to cause renal failure in cats. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Acanthus spinosus L. Acanthaceae. Bears breeches. Distribution: Southern Europe to Western Turkey. Herbaceous perennial flowering plant. Named for spiny leaves. Dioscorides recommended the roots applied for inflammation and spasms, and -when drunk- to promote urine, check diarrhoea, and for phthysis, ruptures and convulsions. The leaves are the model for those at the top of Corinthian columns. Tetraglycosides isolated from the plant show cytotoxicity in sea urchin eggs and crown gall tumour on potato disks. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Taxus baccata L. Taxaceae European Yew. Trees are feminine in Latin, so while Taxus has a masculine ending (-us), its specific name, baccata (meaning 'having fleshy berries' (Stearn, 1994)), agrees with it in gender by having a female ending ( -a). Distribution: Europe. Although regarded as poisonous since Theophrastus, Gerard and his school friends used to eat the red berries (they are technically called 'arils') without harm. Johnson clearly ate the fleshy arils and spat out the seed, which is as poisonous as the leaves. It is a source of taxol, an important chemotherapeutic agent for breast and other cancers. It was first extracted from the bark of T. brevifolia, the Pacific yew tree, in 1966. About 1,100 kg of bark produces 10 g of taxol, and 360,000 trees a year would have been required for the needs of the USA – an unsustainable amount. In 1990 a precursor of taxol was extracted from the needles of the European yew so saving the Pacific trees. It is now produced in fermentation tanks from cell cultures of Taxus. Curiously, there is a fungus, Nodulisporium sylviforme, which lives on the yew tree, that also produces taxol. Because taxol stops cell division, it is also used in the stents that are inserted to keep coronary arteries open. Here it inhibits – in a different way, but like anti-fouling paint on the bottom of ships – the overgrowth of endothelial cells that would otherwise eventually block the tube. The economic costs of anticancer drugs are significant. Paclitaxel ‘Taxol’ for breast cancer costs (2012) £246 every 3 weeks
  • Aralia spinosa L. Araliaceae. Devil's walking stick, Prickly ash, Hercules' club. Tree. Distribution: Eastern North America. Contact with sap causes skin irritation, raw berries mildly toxic to humans, causing diarrhoea and vomiting. Eaten by bears. Used medicinally by Native Americans for a variety of conditions. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Cytisus scoparius (L.) Link Fabaceae. Common broom, Genista. Distribution: Western and central Europe. Culpeper (1650) writes: 'Genista. Broom: … clense and open the stomach, break the stone in the reins [kidneys] and bladder, help the green sickness [anaemia]. Let such as are troubled with heart qualms or faintings, forbear it, for it weakens the heart and spirit vital' and in respect of the flowers he writes: 'Broome-flowers, purge water, and are good in dropsies [now regarded as heart failure with fluid retention].' Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Sambucus nigra f porphyrophylla 'Gerda'
  • Camassia leichtlinii (Baker)S.Watson Hyacinthaceae. Great Camas, Quamash. The species was named for Maximillian Leichtlin (1831-1910 of Baden , Germany, bulb enthusiast who corresponded with J.G. Baker at Kew. Bulbous herb. Distribution: North America. The bulbs of Camassia species were eaten by the Native Americans, the Nez Perce, after cooking by steaming for a day - which suggests they may be poisonous raw. They gave them to the American explorers, Meriwether Lewis and William Clerk, on their expedition (1804-1806) when they ran out of food. The bulbs of the similar looking 'Death camus', Toxicoscordion venenosum have been fatal when ingested by mistake (RBG Kew on-line). Steroidal saponins, which are precursors in the manufacture of steroids and cytotoxic activity has been detected in the sap of the bulbs. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Petasites hybridus (L.)G.Gaertn., B.Mey. & Scherb. Asteraceae. Butterbur, Bog rhubarb. Distribution: Europe, NW Asia. Culpeper (1650) writes: “The roots are ... exceeding good in violent and pestilential fevers, they provoke the terms, expel poison, and kill worms.” Modern herbalists recommend it for a wide range of therapies, but it contains pyrrolizidine alkaloids, which are hepatotoxic and cause liver cancers. Nevertheless, in a trial aimed at reducing frequency of migraine attacks, a standardised commercial preparation was well tolerated, and was effective at higher doses, but placebo in this trial reduced migraines by over 50% in 49% of the patients (Neurology 2004
  • Carthamus tinctorius L. Asteraceae. Safe Flower, False Saffron - Distribution: W. Asia. Dioscorides (in Beck, 2003) notes the seeds as a purgative, but also advises it made up with 30 figs, which must have helped. Gerard (1640) calls it Atractylis flore luteo the yellow distaffe thistle. and follows Dioscorides in its uses, but does get the reader confused with Cnicus benedictus, calling both plants 'wild bastard saffron'. Culpeper makes no mention of it in his early works, but later (1826) have the following: ‘Wild Saffon, or Saf-flower ... accounted a pretty strong cathartic [causing diarrhoea and vomiting], evacuating tough viscid phlegm, both upwards and downwards, and by that means is said to clear the lungs, and help the phthisic [now equated with tuberculosis]. It is likewise serviceable against the jaundice
  • Zinnia cultivar
  • Melilotus officinalis (Common melilot). Also known as Sweet clover
  • Cynara cardunculus L. Asteraceae. Cardoon, Globe Artichoke, Artechokes, Scolymos cinara, Cynara, Cinara. Distribution: Southern Europe and North Africa. Lyte (1576) writes that Dodoens (1552) could find no medical use for them and Galen (c.200 AD) said they were indigestible unless cooked. However, he relates that other authors recommend that if the flower heads are soaked in strong wine, they 'provoke urine and stir up lust in the body.' More prosaically, the roots boiled in wine and drunk it cause the urine to be 'stinking' and so cures smelly armpits. He adds that it strengthens the stomach so causing women to conceive Male children. He goes on to say that the young shoots boiled in broth also stir up lust in men and women, and more besides. Lyte (1576) was translating, I think with elaborations, from the chapter on Scolymos cinara, Artichaut, in Dodoen's Croydeboeck (1552) as L'Ecluse's French translation, Dodoens Histoire des Plantes (1575) does not mention these latter uses, but Dodoen's own Latin translation, the Pemptades (1583), and Gerard's Herbal (1633) both do so. It is useful in understanding the history of these translations to realise that Gerard uses, almost verbatim, the translation of the 'smelly armpit' paragraph from Lyte. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Punica granatum L. Lythraceae Pomegranate, granatum malum, balustines. Distribution: E. Mediterranean to Himalayas. The Pomegranate is in the centre of the Arms of the Royal College of Physicians, perhaps for its use in cooling, and therefore for fevers. However it was the sour pomegranate that would have been used as Dioscorides says the sweet ones are unfit for use in agues. Culpeper (1650) makes no mention of the fruit, but says of the flowers ‘... they stop fluxes and the Terms in women.’ In the Complete Herbal and English Physician (1826) says the fruit ‘... has the same general qualities as other acid fruits.’ Of the flowers he says (among other properties) that ‘A strong infusion of these cures ulcers in the mouth and throat, and fastens loose teeth.’ Gerard (1633) says that the cravings of pregnant women can be abolished with the juice, and perhaps it was scurvy which was being treated effectively when he reports that the juice was very effective against splitting of blood and for loose teeth. The dwarf form of this species, Punica granatum var. nana has fruits no more than 3cm across. Pomegranate bark can only be sold by registered pharmacies in the UK and used to be used as a vermifuge, with the secondary use that the tincture made from it doubled as a permanent ink. In South Africa the fruit rind is used for diarrhoea and stomach ache, and the bark as a vermifuge, but undesirable side effects make this dangerous. It is reported to be effective against fevers, as a diuretic, to lower blood sugar and to be both antibacterial and antiviral (van Wyk, 2000). Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Watsonia pillansii L.Bolus Iridaceae Bugle lily, Distribution: South Africa. Named for Sir William Watson (1715-1787), British botanist and physician, sometime censor at the Royal College of Physicians, London. No medicinal uses. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Perovskia atriplicifolia 'Blue Spire'
  • Lilium henryi Baker Liliaceae. Tiger Lily. Bulbous perennial. Distribution: China. This commemorates Dr Augustine Henry (1857–1930) who collected plants in China and Taiwan while working for Britain’s Imperial Customs Service (Oakeley, 2012). Reported to cause renal failure in cats. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Anemone blanda Schott & Kotschy, Ranunculaceae. Grecian windflower. Genus name may derive from Greek for wind, blanda being Latin for mild or pleasing. Perennial tuberous herb. Distribution SE Europe, Turkey, Lebanon, Syria. Not described until 1854 so no early herbal records under this name. However all species of Ranunculaceae are poisonous, containing protoanemonin, which causes blistering if sap gets on the skin and indigestion if ingested. Photographed in the Medicinal Garden of the Royal College of Physicians, London.