Origin: ML herba paris, lit. prob., herb of a pair (< L herba, herb + paris, gen. of par, a pair: see par, in allusion to even number of flower parts): assoc. with Paris by folk etym.
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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.