The suggestion from Muttley that this might be a reference to Rue, one of the floral emblems of the Lindsay Clan, makes a lot of sense. Rose is, of course the emblem of love. The plant Rue has for many centuries been used as a herbal remedy for getting rid of unwanted pregnancies. It just seems a shame the Cruel Mother didn't take enough of it beforehand and had to resort to murder of the babe/babes after birthing.