Rehm, Heinrich, undated

This series contains letters from a wide range of mycologists, primarily on specimen exchange and identification. In many cases, the quantity of correspondence is quite small, often a single letter. Notable are letters from George Washington Carver, Mordecai Cubitt Cooke, William Farlow, Asa Gray, H. W. Harkness, Auguste B. Langlois, Charles McIlvaine, Charles Horton Peck, Henry Ravenel, Pier A. Saccardo, and William Trelease. The letters of Benjamin Matlock Everhart is the largest single correspondence, numbering over 100 items.