Snapdragon Seeds Madame Butterfly Ivory produce a vision in white as they display their full, fluffy flowers along stems reaching up to 30 inches tall. Known as an azalea type due to their double, long-lasting blooms, Madame Butterfly ivory provides a pleasant fragrance in the garden. Find a full sun location for these beauties, and be sure to harvest once the bottom-most blooms open for an extended life in the vase.