Book
Flora of the British Isles / by A. R. Clapham, T. G. Tutin and E. F. Warburg.1952
Clapham, A. R. (Arthur Roy), 1905-
Book
Withering's British plants : the flowering plants and ferns of Great Britain and Ireland, arranged according to the Linnaean system : with instructions to beginners, illustrative figures, a glossary, and outline of a natural classification / compiled for popular use by William MacGillivray.1858
Withering, William, 1741-1799.