The Collaborative International Dictionary of English v.0.48:

papooseroot \papooseroot\, papoose root \papoose root\n. (Bot.)
   A tall herb (Caulophyllum thalictroides) of eastern North
   America and Asia having blue berrylike fruit and a thick
   knotty rootstock formerly used medicinally; the Cohosh. See
   also Cohosh.

   Syn: blue cohosh, blueberry root, papoose root, squawroot,
        squaw root, Caulophyllum thalictrioides, Caulophyllum
        thalictroides.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

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 Act[ae]a, plants of the
   Crowfoot family.
   [1913 Webster] Cohune

WordNet (r) 3.0 (2006):

cohosh
    n 1: a plant of the genus Actaea having acrid poisonous berries
         [syn: baneberry, cohosh, herb Christopher]