The German physician and botanist Georg Theodor Engelmann (1809-1884) studied medicine in Heidelberg, Berlin and Würzburg, In 1832 Engelmann traveled to America on behalf of relatives for whom he was looking for a suitable land to buy. After traveling through Illinois. Missouri and Arkansas In 1835 he settled down in St. Louis, Missouri, as a practicing physician, and became a sought-after doctor because of his new methods. He dealt intensively with American botany and founded the cactus science of the continent. In 1859 he published his extensively illustrated work "Cactaceae of the Boundary" with an overview of all previously known North American cactus species.
Later he worked on agaves, oaks and conifers, and last but not least vines, In 1845 he first described the American wild vines species Vitis mustangensis, In 1880 he classified the species Vitis cinerea Engelm. ex. Millardet as a separate species, therefore it is also included in the botanical name. Of eminent and far too little appreciated importance for European viticulture at the time of the then phylloxera disaster was that Engelmann the resistance from American vines against the phylloxera discovered and recommended to French scientists, American vines as document for the European varieties (by the way, others had the same idea as well). Together with Alexis Millardet, Jules Émile Planchon, Charles Valentine Riley and Pierre Viala He is considered the savior of viticulture before phylloxera.
As early as 1835, Engelmann devoted himself to his studies of nature. He observed the course and level of the Mississippi and extended his meteorological observations to measure air pressure, precipitation, humidity, cloud cover, and wind conditions. Founded in 1856, the Academy of Science of Saint Louis, whose first president he was, became one of the most respected academies in the United States. He was a member of many scientific academies and learned societies.