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Author
- Greene, Edward Lee, 1843-1915 54
- Howell, Thomas, 1842-1912 50
- Watson, Sereno, 1826-1892 24
- Peck, Morton Eaton, 1871-1959 19
- Rose, J. N. (Joseph Nelson), 1862-1928 17
- Coulter, John Merle, 1851-1928 16
- Rydberg, Per Axel, 1860-1931 15
- Gray, Asa, 1810-1888 14
- Heller, Amos Arthur, 1867-1944 14
- Piper, Charles V. (Charles Vancouver), 1867-1926 14
- Vasey, George, 1822-1893 11
- Nelson, Aven, 1859-1952 10
- Henderson, L. F. (Louis Fourniquet), 1853-1942 7
- Jones, Marcus E. (Marcus Eugene), 1852-1934 6
- Charles Piper Smith 5
- Cronquist, Arthur 5
- Michel Gandoger 5
- Baker, Milo S. (Milo Samuel), 1868- 4
- Constance, Lincoln, 1909-2001 4
- Fernald, Merritt Lyndon, 1873-1950 4