Emil Friedrich August Walter (or Walther) Migula (born 1863 in Zyrowa, Prussia (present-day Poland); died 1938 in Eisenach, Germany) was a German botanist.

In 1890, he was habilitated for botany at Karlsruhe Institute of Technology, where he spent several years as a professor. At Karlsruhe, he also worked in the bacteriology department of the Food Research Institute. He was Professor of Botany at the research academy at Eisenach.^[1]

He published many articles on the subjects of cryptogamic botany, bacteriology, and plant physiology. He is remembered for describing the bacterial genus Pseudomonas, and for publication of Kryptogamen-Flora von Deutschland, Deutsch-Österreich und der Schweiz [Cryptogamic Flora of Germany, Austria, and Switzerland], a work connected with Otto Wilhelm Thomé's Flora von Deutschland [Plants of Germany].^[2] Other significant works by Migula include:

• Die Bakterien, 1891 [Bacteria]
• System der Bakterien. Handbuch der Morphologie, Entwicklungsgeschichte und Systematik der Bakterien, 1897–1900. (two volumes) [System for bacteria. Handbook of morphology, developmental history and systematics of bacteria]
• Pflanzenbiologie, 1900 [Plant biology]^[3]
• Morphologie, Anatomie und Physiologie der Pflanzen, 2nd edition 1906 Digital edition by the University and State Library Düsseldorf