Botany at Cornell
| Year | Event |
| 1865 | Cornell University founded |
| 1868 | Cornell University opened Original Department of Botany founded (1868-1922) Albert N. Prentiss, Head of the Department of Botany (1868-1896) |
| 1870 | Original Department of Botany Herbarium established, based on collections of Horace Mann, Jr. George F. Atkinson, Head of the Department of Botany (1896-1918) |
| 1904 | Cornell University College of Arts & Sciences (CA&S) is established Department of Botany, including its herbarium is housed in CA&S New York State Legislature established the New York State College of Agriculture at Cornell (NYSCA) Libery Hyde Bailey, first Dean of NYSCA (1903-1913) |
| 1907 | L. H. Bailey establishes the Department of Plant Breeding at NYSCA L. H. Bailey establishes the Department of Plant Physiology at NYSCA (1907-1912) |
| 1913 | L. H. Bailey establishes the new Department of Botany at NYSCA (1913-1964) Karl M. Wiegand, Head of this new Department of Botany (1913-1941) Department of Plant Physiology fused with the recently founded Department of Botany Willard W. Rowlee, Head of the Department of Botany (1918-1922) |
| 1921-22 | the original Department of Botany (in the College of Arts & Sciences) is closed the College of Arts & Sciences Herbarium is joined with NYSCA Department of Botany Herbarium to form CU Herbarium |
| 1935 | L.H. Bailey Hortorium Herbarium (BH) is established as an independent unit of NYSCA |
| 1951 | Department of Botany (CU) herbarium renamed Wiegand Herbarium |
| 1964 | Division of Biological Sciences (DBS) is established within NYSCA (1964-1999), |
| 1965 | Section of Genetics, Development and Physiology (GDP) is established within DBS (1965-1977) from parts of the Departments of Botany, Zoology and Plant Breeding the Wiegand Herbarium (1965-1977); becomes and independent unit within NYSCA with R.T. Clausen as Curator the Laboratory of Cell Physiology, Growth & Development (1965-1973) becomes an independent unit within NYSCA with F.C. Steward as Head |
| 1971 | NYSCA renamed College of Agriculture and Life Sciences at Cornell (CALS) |
| 1977 | GDP name changed to Section of Botany, Genetics & Development (BGD, 1977-1980) the Bailey Hortorium Herbarium (BH) and Wiegand Herbarium (CU) merge, staying as an independent unit within CALS-DBS (1977-1999) |
| 1980 | the Section of Botany, Genetics & Development (BGD) is divided into a Section of Plant Biology and a Section of Genetics and Development (1980-1999) |
| 1999 | the Division of Biological Sciences and all its sections dissolved and re-organized into several Departments Current Department of Plant Biology established by joining the former Section of Plant Biology with the L.H. Bailey Hortorium, with W.L. Crepet as Chair |
Modified from: Kass, L. B. and E. Cobb. Landmarks and Milestones in American Plant Biology: The Cornell Connection. Plant Science Bulletin. 53(3): 90-101.