Published in five volumes, this critical flora provides a definitive account of the native, naturalised, frequent garden escapees, and casual species found in the British Isles. Full keys and descriptions allow the user to name all plants occuring in the wild, plus some ornamental trees and shrubs. For the first time, detailed accounts of all the large apomictic genera are given and many infraspecific variants included. Each species account includes common English name, accepted scientific name, synonyms, and description. Information on status, ecology and distribution is also supplied.