Author: Unger, F.
Title: Die pflanzenwelt der Jetztzeit in ihrer historischen Bedeutung.
Description: Wien, Kaiserliche Akademie der Wissenschaften, 1852. Large 4to (39.5 x 27.2 cm). 46 pp. Disbound. = A detailed early study on the history of plant groups and their abundance in different geological epochs. The Austrian medical doctor and botanist Franz Joseph Andreas Nicolaus Unger (1800-1870) was a pioneer in many plant sciences, including palaeobotany, plant physiology and embryology, and plant-soil interaction. Georg Mendel was one of his students. Published in the society's Denkschriften, volume 3. A very good clean copy.

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