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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.

Zoologist-botanist, collector of plant and specimens for the University of Michigan in the Middle East and South Asia. The collection includes biographical and personal materials, correspondence, topical files, journals, writings, estate materials, photographs and motion pictures. Much of the collection relates to his travels and collecting expeditions in the Middle East and South Asia.

The Walter Koelz papers document Koelz's travel and work in South Asia and the Middle East in the 1930s and 1940s, as well as his life in Michigan, both before and after traveling abroad. The collection has been divided into seven series: Biographical and Personal, Correspondence, Topical File, Journals, Writings, Estate Materials, and Visual Materials.

Professor of botany at University of Michigan, curator of algae at the University Herbarium, and biologist with the atomic bomb test program in Marshall Islands in 1946. Correspondence and other papers relating to his scientific interests and activities.

The Taylor papers are arranged into two principal series; correspondence (1918-1980) and Topical and Subject Papers. Taylor corresponded with most of the significant figures in the field of cytology and algae. The papers do not date beyond 1980 when Taylor left Michigan and retired to the Farlow Herbarium at Harvard in Cambridge.