Leonhart Fuchs [ˈfʊks] (1501 – 10 May 1566), sometimes spelled Leonhard Fuchs, was a German physician and botanist. His chief notability is as the author of a large book about plants and their uses as medicines, i.e. a Herbal Book. It was first published in 1542 in Latin. It has about 500 accurate and detailed drawings of plants, which were printed from woodcuts. The drawings are the book's most notable advance on its predecessors. Although drawings were in use beforehand in other Herbal books, Fuchs' Herbal book proved and emphasized high-quality drawings as the most telling way to specify what a plant name stands for.
The botanical genus Fuchsia is named in his honour, and consequently the colour fuchsia.
Fuchs was born in 1501 in Wemding in the Duchy of Bavaria. After attending a school in Heilbronn, Fuchs went to the Marienschule in Erfurt, Thuringia at the age of twelve, and graduated as Baccalaureus artium. In 1524 he became Magister Artium in Ingolstadt, and received a doctor of medicine degree in the same year.
From 1524-1526 he practiced as a doctor in Munich, until he received a chair of medicine at Ingolstadt in 1526. From 1528-1531 he was the personal physician of Georg, Margrave of Brandenburg-Ansbach in Ansbach.
Fuchs was called to Tübingen by Ulrich, Duke of Württemberg in 1533 to help in reforming the University of Tübingen in the spirit of humanism. He created its first medicinal garden in 1535 and served as chancellor seven times, spending the last thirty-one years of his life as professor of medicine. Fuchs died in Tübingen in 1566.