Johannes Müller Argoviensis was the name used by the Swiss botanist Johann Müller (9 May 1828 in Teufenthal, Aargau – 28 January 1896 in Geneva). He was the monographer of Resedaceae, Apocynaceae and Euphorbiaceae in A. P. de Candolle's Prodromus and Martius's Flora Brasiliensis. He was also an authority on lichens.