He then moved to the Vavilov All-Union Institute of Crop Plants in Leningrad to expand his scientific studies. He took a particular interest in the history of plant geography. He published a monograph on this topic in 1932,[3] which was translated to English and published in the West posthumously.[4] This book has been hailed as one of the twentieth century's key writings in the evolution of plant geography
.[5] In 1934, he was made professor at the Pokrovsky Pedagogical Institute, where he taught botany parallel to his research at the Vavilov Institute. In 1936, he published his Historical Geography of Plants,[6] of which an expanded version was published posthumously.[7]
Wulff died in 1941 during the Siege of Leningrad - killed by an exploding bomb.
^Wulff, E.V. (1927–30). Флора Крыма (Flora Kryma) - Flora Taurica, vol. 1 Pteridophyta. Gymnospermae, Monocotyledoneae (3 fascicles 1927, 1929, 1930), vol. 2 Dicotyledonae (3 fascicles 1947, 1953, 1960, edited by S. S. Stankov), vol. 3 Dicotyledonae (3 fascicles 1957, 1966, 1969 edited by S. S. Stankov, N. I. Rubtzov & L. A. Privalova), Addenda et corrigenda ad. vol. 1 (1959; edited by S. S. Stankov & N. I. Rubtzov) (in Russian). Moscow: Sel'khozgiz.
^Wulff, E.V. (1932). Введение в историческую географию растений (Vvedenie v Istoricheskuiu Geofgrafiiu Rastenii). Moscow: Sel'khozgiz.
^Wulff, E.V. (1943). An Introduction to Historical Plant Geography; translated by Elizabeth Brissenden. A new series of plant science books. Vol. 10. Waltham, MA: Chronica Botanica Co. p. 223. Republished as Chapter 18 in Foundations of biogeography: classic papers with commentaries edited by Mark V. Lomolino, Dov F. Sax and James H. Brown Google Books
^Wulff, E.V. (1936). Историческая география растений (Istoricheskaia Geografiia Rastenii) [Historical Geography of Plants] (in Russian). Moscow / Leningrad: Academy of Sciences of the U.S.S.R.
^Wulff, E.V. (1944). Историческая география растений. История флор земного шара (Istoricheskaia Geografiia Rastenii - Istoriia Flor Zemnogo Shara) [Historical Geography of Plants - History of the World's Flora] (in Russian). Moscow / Leningrad: Academy of Sciences of the U.S.S.R.