In article , Jaques d'Alltrades
writes

Hop (Humulus lupulus) is a relative of the mulberry. Hemp used to be
considered to be a relative of the mulberry, but is now more commonly
placed in its own group.

So when did that happen? Stace - the standard flora of the british
isles, has Cannabis and Humulus in the Cannabinacae, and Morus and Ficus
in Moraceae.

Blamey, Fitter and Fitter, Wild Flowers of Britain and Ireland, pub
2003, also has Humulus and Cannabis in the same family.
--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm