Gustav Hegi (13 November 1876 in Rickenbach, Canton of Zürich - 23 April 1932 in Goldbach, Canton of Zürich) was a Swiss botanist.
It contains extensive morphological, ecological and phytogeographical of all plant species occurring in Central Europe.
He went on to obtain a PhD degree from the Ludwig Maximilian University of Munich in 1905 under the supervision of Karl von Goebel.
Between 1908 and 1931, Hegi wrote - roughly one third - and edited the monumental Illustrierte Flora von Mittel-Europa.
The work was preceded by his attempt to describe Alpine flora, regarded as the first comprehensive account of the plant community in the Alpine tundra.