"Lilies of all kinds, the flower-de-luce being one!" --William Shakespeare The Winter's Tale
Apologies to you Will, but the symbol of France is no lily but instead a stylized iris. A lily by any other name might still be a lily though, right? Sorry, most definitely not. Many a flower, although welcome in the garden, masquerades under a nom-de-plume. Common examples are Lily of the Valley (Convallaria) and Daylily (Hemerocallis).