Ferdinand Albin Pax (26 July 1858 – 1 March 1942) a German botanist and entomologist specializing in Lepidoptera, Diptera, and spermatophytes. He
In 1980 he became Curator at the Museum of Natural History in Stockholm in the Department of Spermatophyte Botany.
The monophyly of Euphorbiaceae had long been held in doubt by some, but the first strong evidence of its polyphyly came in 1993 with the first maximum parsimony analysis of DNA sequences of the gene rbcL from a large number of seed plants.