Heinrich Simon Ludwig Friedrich Felix Rehm (20 October 1828, Ederheim – 1 April 1916, Munich) was a German mycologist and lichenologist.
He studied at the Universities of Erlangen, Munich and Heidelberg, earning his medical doctorate in 1852. During his career, he was a practicing physician in Dietenhofen (from 1854), Sugenheim (from 1857) and Windsheim (from 1871). In 1875, he became regional medical examiner in Lohr am Main.
Rehm, H. 1874. Ascomyceten Fasc. 5: 201-250----. 1875. Ascomyceten 6: 251-300----. 1881, publ. 1882. Beiträge zur Ascomyceten-Flora der Deutschen Alpen und Voralpen. Hedwigia 20: 97-103----. 1882. Beiträge zur Ascomyceten-Flora der Deutschen Alpen und Voralpen. Hedwigia 21 (8): 113-123.----. 1883. Ascomyceten Fasc. XV: 701-750----. 1883. Ascomycetes Lojkani Lecti in Hungaria, Transilvania et Galicia. [i-iv], [1]-70. Berlin; Friedländer & Sohn----. 1883. Ascomyceten fasc. XIV. Hedwigia 22: 52-61----. 1885. Ascomyceten fasc. XVI. Hedwigia 24: 7-17----. 1885. Ascomyceten fasc. XVII. Hedwigia 24 (6): 225-246----. 1888. Ascomyceten 923, in sched.----. 1888. Ascomyceten fasc. XIX. Hedwigia 27: 163-175----. 1889. Ascomyceten: Hysteriaceen und Discomyceten. Dr L. Rabenhorst’s Kryptogamen-Flora von Deutschland, Oesterreich und der Schweiz Zweite Auflage. Vol. 1. 3. Abth: Ascomyceten: Hysteriaceen und Discomyceten. 209-336----. 1889. Ascomyceten, Fasc. XX. Hedwigia 5: 347-358In 1861 the fungi genus Rehmia was named after him by lichenologist August von Krempelhuber. Other mycological genera that contain his name are Rehmiella, Rehmiodothis and Rehmiomycella.
