NATIONAL LIBRARY OF MEDICINE / SCIENCE PHOTO LIBRARY NATIONAL LIBRARY OF MEDICINE / SCIENCE PHOTO LIBRARY
White thistle (Spina alba sylvestris) plant, 15th-century illustration. This plant is used in herbal medicine. This coloured woodcut is from an edition of 'Hortus sanitatis' (Garden of Health), printed in the German city of Mainz by Jacob Meydenbach. Also called 'Ortus Sanitatis', this work contained treatises on plants, animals and medicinal treatments, and was first published in 1491.
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