Key to the Families of Angiosperms

by Bertel Hansen and Knud Rahn
Copyright (c) 1986, 1993 British Museum (Natural History)

     This is the key to angiosperm families published as a punched-card
key by Hansen and Rahn (1969, Dansk Botansk Arkiv 26:1-45).  The
corrections published by Hansen and Rahn (Bot. Tidsskr. 67:152-153,
74:177-178) have been added.  The copyright for these data is held
by the Department of Botany of the British Museum (Natural History)
who have given their permission for distribution in this form.