Founded in 1921, the Tom S. & Miwako K. Cooperrider Herbarium at Kent State University (KE) currently houses approximately 93,000 specimens of vascular plants, bryophytes, and lichens. The collection primarily focuses on the flora of northeastern Ohio and adjacent regions. Significant collections include those of T. S. Cooperrider and his students, and the late 19th and early 20th century collections of Almon Rood and his contemporaries.