His father Caspar Jungermann (1531–1606) was a professor of law in Leipzig, his mother Ursula Camerarius (1539–1604) the daughter of the humanist Joachim Camerarius the Elder (1500-1574), a colleague and friend of Philipp Melanchthon.
After studying medicine, Jungermann first lived in Nuremberg and then became professor of anatomy and botany in Giessen from 1614 to 1625.
Today it is the oldest botanical garden in Germany, still standing in its original location.
In addition to the two floras, he published the Hortus Eystettensis together with Basilius Besler in Nuremberg as early as 1613.
Heinrich Bernhard Ruppius named the genus Jungermannia from the plant family Jungermanniaceae in his honour.