The German doctor and botanist Johann Simon Kerner (1755-1830) was the son of a gardener. From 1780 he worked as a teacher of botany and plant drawing at the "Hohe Karlsschule" near Stuttgart, founded in 1780 by Duke Karl Eugen (1728-1793) of Württemberg. After the dissolution of the "Hohe Karlsschule" he became supervisor in the Duke's Botanical Garden in 1794. He was the editor of many illustrated works, most of whose pictures were drawn and engraved by himself. These included "Description and Illustration of Trees", "Germany's Poisonous Plants" and "Poisonous and Edible Sponges". From 1803 to 1815 he produced a series of 140 illustrated plates showing all the varieties of grapevines that were widespread in Germany at that time. These are included in his work "Le Raisin: ses espèces et variétés dessinées et colorées d'après nature" (an example of these carefully executed drawings is the Muscat d'Alexandrie variety). More recently, this has made it possible to identify grape varieties that are already considered extinct, such as the Blauer Scheuchner, rediscovered in 2006 on the Badische Bergstrasse. Johann Simon Kerner must not be confused with the physician and contemporary Justinus Kerner (1786-1862), after whom the new variety Kerner was named.