The British and Irish herbarium
The British and Irish Herbarium is one of the most comprehensive collections of plants from a particular area anywhere in the world.
Nearly every known British and Irish native or established non-native taxon is represented.
Every native genus and almost all native species (over 99 per cent) are represented. Most taxa are represented by a wide range of material collected throughout their British Isles range.
Non-native species are more unevenly collected, although archaeophytes approach native species in degree of representation. Neophytes are generally poorly represented, particularly those of casual origin.
The herbarium is particularly rich in the apomictic genera Hieracium, Taraxacum, Rubus and Sorbus.
The collection principally comprises material collected from the mid-nineteenth century to the 1940s. Collecting post-1970 has been ad hoc and minimal, although recently more targeted specimen collection has taken place in the London area and the Isles of Scilly.
Country of origin
The collection comprises specimens from the United Kingdom, Ireland, the Isle of Man and the Channel Islands. The collection is well represented by material from southern England, particularly Surrey, and parts of western Scotland, such as the Isle of Mull. Ireland is rather poorly represented with most material coming from the southwest or the counties adjacent to Dublin.