Ludwig Jost ForMemRS[1] (born 1865 – 1947) was a German botanist, and university professor.
Jost was born on November 13, 1865, in Karlsruhe, which was then part of the Grand Duchy of Baden.
In 1887 he obtained his PhD as a student of Anton de Bary, and later on, worked as an assistant to Karl von Goebel at the University of Marburg.
Afterwards, he returned to Strasbourg, where in 1891, he received his habilitation under the sponsorship of Hermann zu Solms-Laubach.
[2] He earlier research largely dealt with morphological and histological issues — later on, his main field of study involved the physiology of plants; working with subjects such as: growth rhythm, nyctinasty, geotropism, leaf positioning, electrical potential differences on cell walls, et al.[2] He died February 22, 1947, in Heidelberg.