snakeroot \snake"root`\, n. bot.
   any one of several plants of different genera and species,
   most of which are or were formerly reputed to be
   efficacious as remedies for the bites of serpents; also, the
   roots of any of these.
   1913 webster

   note: the virginia snakeroot is aristolochia serpentaria;
         black snakeroot is sanicula, esp. sanicula
         marilandica, also cimicifuga racemosa; seneca
         snakeroot is polygala senega; button snakeroot is
         liatris, also eryngium; white snakeroot is
         eupatorium ageratoides. the name is also applied to
         some others besides these.
         1913 webster
see also:
aristolochia serpentaria sanicula sanicula marilandica cimicifuga racemosa polygala senega liatris 
eryngium eupatorium ageratoides 

cohosh \co"hosh\, n. bot.
   a perennial american herb caulophyllum thalictroides,
   whose rootstock is used in medicine; -- also called pappoose
   root. the name is sometimes also given to the cimicifuga
   racemosa, and to two species of actaea, plants of the
   crowfoot family.
   1913 webster cohune
see also:
caulophyllum thalictroides pappoose root cimicifuga racemosa actaea 

cimicifuga racemosa
     n : north american bugbane found from main and ontario to
         wisconsin and south to georgia syn: black cohosh, black
         snakeroot, rattle-top
see also:
black cohosh black snakeroot rattle-top