We recently put in an order for tea from one of our favorite Chicago purveyors, Rare Tea Cellar, and one of their varieties is Sicilian Wild Flower Chai, featuring the the flavor “Fiori di Sicilia,” which literally means “Flowers of Sicily.” We were intrigued, so we took a chance (and it turns out we love the tea)! We looked up the extract, and it is not from any Sicilian flower per se, but is actually a combination of citrus and vanilla extracts. You can buy Fiori di Sicilia from King Arthur, or a variety of online sources. Food 52 has a cookie recipe that calls for Fiori di Sicilia, and it can be easily substituted for vanilla extract in most sweet recipes. If you are feeling especially DIY, An Edible Mosaic has a recipe to make your own Fiori di Sicilia extract. A similar flavoring is called Panettone Extract, which combines both vanilla and citrus flavors, along with some additional spices. This variety is also especially popular in Brasil, where it is known as Essência de panetone.
Eating The World 
It actually means flower (singular) od sicily. I think its just a substitute hustorically for orange blossom water