On the Proteaceae: The Evolution and Classification of a Southern Family is a highly influential monograph on the evolution, biogeography and taxonomy of the flowering plant family Proteaceae. Authored by Lawrie Johnson and Barbara Briggs, it appeared in Volume 70 of Botanical Journal of the Linnean Society in 1975. Johnson and Briggs had presented what would become the paper at a meeting of the Linnaean Society on 6 December 1973 amid celebrations of 200 years since the birth of Robert Brown.