M.Roem.

Max Joseph Roemer (1791–1849) was a German botanist who worked in Weimar.

He served as a Landrichter (country judge) in the Bavarian town of Aub, afterwards working as a private scientist in Würzburg.

He is the taxonomic authority of the genera Heteromeles, Pyracantha and Erythrocarpus as well as of numerous plant species.