The plant lady's-thumb, <em>Polygonum Persicaria</em>; also, the garden species <em>P. orientale</em> (see <internalXref urlencoded="prince%27s-feather">prince's-feather</internalXref>, 2). Also called <internalXref urlencoded="peachwort">peachwort</internalXref>. See <internalXref urlencoded="heart%27s-ease">heart's-ease</internalXref>, 2.