The Collaborative International Dictionary of English v.0.48:

Lady's seal \La"dy's seal"\ (l[=a]"d[i^]z s[=e]l").(Bot.)
   (a) The European Solomon's seal (Polygonatum
       verticillatum).
   (b) The black bryony (Tamus communis).
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bryony \Bry"o*ny\ (br[imac]"[-o]*n[y^]), n. [L. bryonia, Gr.
   brywni`a, fr. bry`ein to swell, esp. of plants.] (Bot.)
   The common name of several cucurbitaceous plants of the genus
   Bryonia. The root of Bryonia alba (rough bryony or
   white bryony) and of Bryonia dioica is a strong,
   irritating cathartic.
   [1913 Webster]

   Black bryony, a plant (Tamus communis) so named from its
      dark glossy leaves and black root; black bindweed.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Tamus communis
    n 1: common European twining vine with tuberous roots and
         cordate leaves and red berries [syn: black bryony, black
         bindweed, Tamus communis]