A wooded valley with a plant of the Araceae family in the foreground and verses below. Etching by Matthaeus Merian the elder, c. 1629.

Rudbeckia triloba L. Asteraceae Orange Cone flower. Herbaceous perennial. Distribution: North America. It is named for Olof Rudbeck, father (1630–1702) and son (1660–1740). Olof Rudbeck the Elder was professor of medicine at Uppsala University, and established a botanic garden there. He was the discoverer of the human lymphatic system. His son succeeded his father as professor of medicine, and one of his students was Carl Linnaeus (1707–88) who named the genus Rudbeckia after him and his father. It is a plant which is poisonous to cattle, sheep and pigs with no medicinal uses. Austin (1974) discusses R. hirta, also regarded as a toxic plant. It was used externally by the Cherokee to bathe sores and snakebites and made into a tea for treating diarrhoea. The Seminoles used it for headaches and fever and the Miccosukee for sunstroke and headache. The Cherokee and the Iroquois used it to treat intestinal worms Photographed in the Medicinal Garden of the Royal College of Physicians, London.

Origanum dictamnus L. Lamiaceae Dittany of Crete, Hop marjoram. Distribution: Crete. Culpeper (1650) writes: ‘... hastens travail [labour] in women, provokes the Terms [menstruation] . See the Leaves.’ Under 'Leaves' he writes: ‘Dictamny, or Dittany of Creet, ... brings away dead children, hastens womens travail, brings away the afterbirth, the very smell of it drives away venomous beasts, so deadly an enemy is it to poison, it’s an admirable remedy against wounds and Gunshot, wounds made with poisoned weapons, draws out splinters, broken bones etc. They say the goats and deers in Creet, being wounded with arrows, eat this herb, which makes the arrows fall out of themselves.' Dioscorides’ Materia Medica (c. 100 AD, trans. Beck, 2005), Pliny the Elder’s Natural History and Theophrastus’s Enquiry into Plants all have this information, as does Vergil’s Aeneid where he recounts how Venus produced it when her son, Aeneas, had received a deadly wound from an arrow, which fell out on its own when the wound was washed with it (Jashemski, 1999). Dioscorides attributes the same property to ‘Tragium’ or ‘Tragion’ which is probably Hypericum hircinum (a St. John’s Wort): ‘Tragium grows in Crete only ... the leaves and the seed and the tear, being laid on with wine doe draw out arrow heads and splinteres and all things fastened within ... They say also that ye wild goats having been shot, and then feeding upon this herb doe cast out ye arrows.’ . It has hairy leaves, in common with many 'vulnaries', and its alleged ability to heal probably has its origin in the ability of platelets to coagulate more easily on the hairs (in the same way that cotton wool is applied to a shaving cut to hasten clotting). Photographed in the Medicinal Garden of the Royal College of Physicians, London.

Common elder (Sambucus nigra): flowering and fruiting stems. Coloured lithograph by W. G. Smith, c. 1863, after himself.

Godfrey's Extract of Elder Flowers.

Twelve British wild flowers with their common names. Coloured engraving, c. 1861, after J. Sowerby.

Tradescantia 'Concorde Grape'

Rudbeckia cultivar

Tibetan medicine and its divine origins. Distemper painting by Chundu, 1970.

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