bugbane
noun
bug·bane ˈbəg-ˌbān 
: any of several perennial herbs (genus Cimicifuga) of the buttercup family native to northern temperate woodlands
especially : black cohosh sense 1
Note: Bugbanes are sometimes classified in a closely related genus (Actaea).
Example Sentences
Recent Examples on the Web Their names were homespun: sweet pepperbush, oak leaf hydrangea, Virginia sweetspire, New Jersey tea, even bugbane. 
Perdita Buchan, The Christian Science Monitor, 24 May 2017
Perdita Buchan, The Christian Science Monitor, 24 May 2017 Word History
First Known Use
1723, in the meaning defined above
Medical Definition
bugbane
noun
bug·bane ˈbəg-ˌbān
: a plant of the genus Cimicifuga
especially : black cohosh