This file includes the following letters:

Miller, Robert C. 21 December 1938

Moldenke, Harold N. 13 August 1937, 8 September 1937, 1 February 1940, 22 February 1940, 24 January 1941, 20 February 1941, 28 June 1941

Moreau, R. P. 18 May 1934, 25 August 1938

Morrison, Benjamin Y. 27 May 1936

Morton, C. V. 6 February 1932

Munz, Philip A. 19 February 1930, 25 January 1933

Payson, Lois 18 May 1940

Peck, Morton E. 7 January 1938, 24 January 1938

Peirson, Frank W. 8 June 1938

Penland, C. William T. 20 November 1939

Pickel, Bento Jose 24 March 1950, 16 June 1950

Pilger, R. 29 May 1933

Purer, Edith A. 30 September 1938, 12 December 1938

Rehder, Alfred 19 April 1927 (see Greenman, 11 April 1927), 21 April 1927 (see Greenman, 25 April 1927)

Robinson, B. L. 20 February 1928 (see Mathias, 17 February 1928), 28 January 1930, 20 April 1933

Rollins, Reed C. 2 February 1938

St. John, Harold 11 August 1938

Sanderson, Ruth D. 21 March 1933, 17 January 1935