Johann Amman, Johannes Amman or Иоганн Амман (22 December 1707 in Schaffhausen – 14 December 1741 in St Petersburg), was a Swiss-Russian botanist, a member of the Royal Society and professor of botany at the Russian Academy of Sciences at St Petersburg. He is best known for his "Stirpium Rariorum in Imperio Rutheno Sponte Provenientium Icones et Descriptiones" published in 1739 with descriptions of some 285 plants from Eastern Europe and Ruthenia (now Ukraine). The plates are unsigned, though an engraving on the dedicatory leaf of the work is signed "Philipp Georg Mattarnovy", a Swiss-Italian engraver, Filippo Giorgio Mattarnovi (1716-1742), who worked at the St. Petersburg Academy.