Content Description The U.S. National Arboretum Collection Cherry Tree Files contain materials related to the history of cherry trees introduced to the District of Columbia from Japan. The files were compiled by botanist Roland Maurice Jefferson beginning in 1973, during his career as a botanist at the U.S. National Arboretum, and after his retirement. One of the products of this research was the publication, The Japanese Flowering Cherry Trees of Washington, D.C.: A Living Symbol of Friendship (1977),...

Content Description The USDA Molecular Plant Pathology Laboratory Photograph Collection includes photographs, associated notes, and a record book on various U.S. Department of Agriculture (USDA) activities and personnel, dated between 1888 and 1968. The collection contains a series of photographs related to testing insecticide spraying apparatuses on different crops between 1912 and 1944. Much of the collection consists of photographs of employees from departments of Plant Industry and Plant Pathology, and...