An illustration of the herb Paris plant.
herb Paris definition by Webster's New World
Origin: Midieval Latin herba paris, literally probably , herb of a pair (; from Classical Latin herba, herb plush paris, genitive of par, a pair: see par, in allusion to even number of flower parts): associated, association with Paris by folk etymology
herb Paris definition by American Heritage Dictionary
Origin: Probably Medieval Latin herba paris, herb of a pair (perhaps a reference to the two pairs of leaves on the whorl) : Latin herba, herb + Latin paris, genitive of pār, equal; see par.