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The Blanchard family papers document the lives and careers of several members of the Blanchard, Cobb, and Proctor families from the mid-nineteenth century through the late twentieth century. Includes visual materials, publications, personal writings, and extensive correspondence files.

The Blanchard Family Papers document the professional achievements and personal lives of several generations of a scientifically minded and artistically gifted family. The papers focus heavily upon the eminent plant pathologist and nematologist Nathan A. Cobb, his wife Alice Vara Cobb, their daughter, biologist Frieda Cobb Blanchard, and her husband, herpetologist Frank Nelson Blanchard (the latter two of whom were professors at the University of Michigan). In addition to the photographs, drawings, correspondence, journals, and writings of these four individuals, the collection is rich in family correspondence, diaries, and personal papers from other members of the Cobb and Blanchard families (and their forebears and branches, including the Bigelow, Proctor, Ross, White, and Randall families). The Blanchard Family Papers will be of value to researchers interested in a variety of topics: scientific endeavors and methodologies (and in particular those related to agronomy, nematology, botany, and herpetology); the visual arts and the development of photography in the late nineteenth and early twentieth centuries; colonial and provincial life in Australia and Hawaii (respectively); and the daily affairs of American (and Michigan) families throughout the twentieth century. The Blanchard Family Papers consist of seven series: Nathan A. Cobb, Alice Vara Cobb, Frieda Cobb Blanchard, Frank Nelson Blanchard, Blanchard and Cobb Family Letters, Other Family Members, and Isaac G. Blanchard.

The University of Michigan Herbarium, started in 1837, is home to over 1.7 million species and is one of the world's leading botanical collections. The U-M Herbarium records collection includes correspondence, photographs, and research materials documenting early Herbarium history, U-M's ethno botanical research practices, and the international professional discourse surrounding botanical research.

The collection represents the Herbarium's actions as a collector of the historical correspondence and photographs of botanical researchers. The records contained within this collection primarily document the research methods and professional conversations of American botanists. Through the correspondence and papers of Michigan and U-M botanists, this collection also documents the development of the Herbarium, its activities, and its status as a collector of botanical specimens and historical records. Researchers should note that there are photographs and plant specimens scattered throughout the correspondence series, and whereas the plant specimens are noted in the box listing, the photographs are not. The collection's four series include Harley Harris Bartlett Papers, Herbarium Historical Correspondence, Herbarium Historical Photographs, and Archived Website.