Vincetoxicum officinale

from The Collaborative International Dictionary of English v.0.48

Swallowwort \Swal"low*wort`\, n. (Bot.)
      (a) See {Celandine}.
      (b) A poisonous plant ({Vincetoxicum officinale}) of the
          Milkweed family, at one time used in medicine; -- also
          called {white swallowwort}.
          [1913 Webster]

   {African swallowwort}, a plant of the genus Stapelia.
      [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Vincetoxin \Vin`ce*tox"in\, n. (Chem.)
   A glucoside extracted from the root of the white swallowwort
   ({Vincetoxicum officinale}, a plant of the Asclepias family)
   as a bitter yellow amorphous substance; -- called also
   {asclepiadin}, and {cynanchin}.
   [1913 Webster]

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