ESCHSCHOLTZ, JOHANN FRIEDRICH Russian traveller and naturalist, was born in Nov. 1793, in Dorpat, where he died in May 1831. He was naturalist and physician to Otto von Kotzebue's exploring expedition during 1815-18, and then became professor of anatomy (1819) and director of the zoological museum in Dorpat. He published the System der Akalephen (1829), and the Zoologischer Atlas (1829-33). The botanical genus Eschscholtzia, which comprises the California poppies, was named by Chamisso in his honour.