The herbarium consists of approximately 50,000 specimens, and is the largest collection in the region, containing a significant and unique record of the local flora. The majority are herbarium sheets of flowering plants, but the collection also includes mosses, liverworts, lichens, fungi, seaweeds, and wood samples. Major collectors include James E. Bagnall, Rev. E. M. Reynolds, Sir John B. Stone, William Whitwell, Christine Goodman and Walter H. Hardaker.
- the Bagnall collection, which was the basis for the first published ‘Flora of Warwickshire’
- the Ick herbarium, which is a significant early record of the environment of Birmingham
- the internationally significant Stone herbarium contains type specimens collected by Cyrus G. Pringle.