Subseries c: Russian Correspondence, circa 1950-1992

Consists of outgoing and incoming correspondence with colleagues in the former Soviet Union, some of which is typewritten in Russian (Cyrillic). There are seven files of Cronquist's correspondence with Armen Takhtajan (1957 to 1992), including four pertaining to specific projects or publications undertaken in collaboration. One file pertains to the Soviet physicist and dissident Andrei Sakharov relating to constituent opinions of the Botanical Society of America members regarding a position statement of the American Association for the Advancement of Science on the Sakharov case in 1973.