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- Greenhouses 142
- College buildings 38
- Universities and colleges--Faculty 30
- Horticulture 14
- College students 13
- Oregon State College. Agricultural Experiment Station 10
- Pharmacy 8
- Flowers 6
- National Science Foundation (U.S.) 6
- Politicians 6
- American Legion 5
- Douglas fir 5
- Meetings 5
- Oregon--Politics and government 5
- Portraits, Group 5
- Seedlings 5
- Agriculture 4
- Coote, George, 1842-1908 4
- Horticulture Building 4
- Waldo Hall 4
