To decide, Lets take a peek back into history for some insight…
The Calla Lily, Zantedeschia Aethiopica is not actually related to true lillies (Lilium). The Calla is actually an Arum and is closely related to houseplants such as Spathiphyllum, Monstera or Caladium.
Since ancient Roman days the Calla Lily has been treasured as a flower of celebration. Calla lilys were the flowers early Romans used to mark the passage of Winter Solstice. They would plant the Calla just inside the portal of their homes, timing to bloom for Winter Solstice while giving the effect of bringing the light indoors during the darkest days of the year. The greater the display of calla lilys represented a greater degree of wealth.
The Calla Lily was also a sacred flower of the Minoans and in addition was prized among acient Jews. In Christianity, the flower represented purity and chastity.
The name Calla Lily is derived from a greek word for Beauty. I think they “hit the nail on the head” with this name. I personally can not think of a better representation of beauty and elegance than that of a Calla Lily.