This plant used as an emblem, esp. of remembrance.

a knot of white ribbon, or a white rosette, sometimes worn by guests at a wedding.

a knot of ribbons, a floral decoration, or a similar ornament worn by wedding guests or members of the bridal party.

†(a) a knot of white ribbon, or a white rosette, sometimes worn by guests at a wedding (obsolete); (b) a small gift given to guests at a wedding.

Orange blossom as traditionally worn or carried by the bride at a wedding ceremony. Also figurative (with reference to this bridal tradition).