Johann Gottfried Zinn
Considering his short life span, Zinn made a great contribution to the study of anatomy. In his book Descriptio Anatomica Oculi Humani, he provided the first detailed and comprehensive anatomy of the human eye.
In addition to his medical career, Zinn was also an ardent botanist. Perhaps because of his interest in the human eye, in 1750, the German Ambassador to Mexico sent Zinn some seeds of mal de ojos, which was considered a weed in Mexico. The plant (Kalanchoe daigremontiana), also known as Mother of Thousands, is used in many cultures as an ingredient in a potion to "ward off the evil eye" (mal de ojo).
image courtesy Wikipedia.org
It was Botanist Carolus Linnaeus who designated a genus of flowers in the family Asteraceae, native to Mexico, as Zinnia in his honor.
Information on Johann Zinn from wikipedia.org.