Johann Horkel (8 September 1769 in Burg auf Fehmarn – 15 November 1846 in Berlin) was a German physician and botanist.
From 1787 he studied medicine at the University of Halle, where in 1802 he was named an associate professor.
[1][2] In 1800/01 he was editor of the journal Archiv für die thierische Chemie,[3] and for a period of time, was an editor of the Deutsches Archiv für die Physiologie.
[4] He was an uncle and a significant influence to the career of botanist Matthias Jakob Schleiden.
commemorate his name,[6] as does the fish species Rhinobatos horkelii (Brazilian guitarfish).