pokeweed

poke·weed

noun \ˈpō-ˌkwēd\

Definition of POKEWEED

: a coarse American perennial herb (Phytolacca americana of the family Phytolaccaceae, the pokeweed family) which has stalks of white flowers, dark purple juicy berries, and a poisonous root and from which is obtained a mitogen that has been used to stimulate lymphocyte proliferation