Theodor Friedrich Ludwig Nees von Esenbeck, a notable German botanist and pharmacologist, passed away on this day in 1837. He worked in Basel for the Bernoulli family at the Goldenen Apotheke, contributing significantly to pharmacological analysis and plant taxonomy. Nees von Esenbeck later became a full professor at the University of Bonn and is honored in the naming of the plant genus Neesia. See wikipedia for more information.