Ca. 1800–1930, ca. 14,280 items. Includes 10 letters, 1846–50, between Asa Gray and the Russian scientist F. E. Fischer. The subject of the letters is entirely botanical, dealing with specimens that Fischer was sending to the United States. (NUCMC 75–1978) The file may contain other correspondence between Russian and American botanists. The Herbarium prefers to be contacted by mail.
