common dogbane: North American perennial having pinkish flowers in loose cymes; used in folk medicine for pain or inflammation in joints
dogbane: any of several poisonous perennial plants of the genus Apocynum having acrid milky juice and bell-shaped white or pink flowers and a very bitter root
swing voter: a voter who has no allegiance to any political party and whose unpredictable decisions can swing the outcome of an election one way or the other