Friedrich Heinrich Helmut Lieth ((1925-12-16)16 December 1925 – (2015-04-16)16 April 2015) was a German ecologist, botanist and phytogeographer.
He was then visiting professor in Venezuela and Colombia, professor of botany at the University of Hawaii and at the University of North Carolina at Chapel Hill.
From 1977 to 1992 he was a professor at the University of Osnabrück where he held the chair for ecology.
[3] Helmut Lieth married Magdalena Roth in 1952.
[3] Lieth became widely known through the climate diagram world atlas published together with Heinrich Walter between 1960 and 1967.