The Collaborative International Dictionary of English v.0.48:

Squawroot \Squaw"root`\ (skw[add]"r[=oo]t`), n. (Bot.)
   A scaly parasitic plant (Conopholis Americana) found in oak
   woods in the United States; -- called also cancer root.
   [1913 Webster]

WordNet (r) 3.0 (2006):

squawroot
    n 1: tall herb of eastern North America and Asia having blue
         berrylike fruit and a thick knotty rootstock formerly used
         medicinally [syn: blue cohosh, blueberry root,
         papooseroot, papoose root, squawroot, squaw root,
         Caulophyllum thalictrioides, Caulophyllum
         thalictroides]