Dioscoreaceae
From FloralWIKI
The Black Bryony family
This family, closely related to the Liliaceae, includes the Yam in its worldwide distribution but is represented by only one species in the UK - Tamus communis or Black Bryony.
Black Bryony is a confusing member of our UK flora as it is similar (very superficially) to White Bryony - a member of the Curcurbitaceae.
(I am not sure whether the family is universally dioecious, certainly many species, including Black Bryony, are.)
Genus of the family in FloralImages:
