The information below, may help you. It doesn't appear that there are any specific flowers which are only grown in Italy.
"The traditional symbolic flower for Italy is the Rose
while the White Poppy or White Lily
serves as religious symbolic flower and according to popularity, Violet
is considered a flower symbol in the country.
The flowers which the people love to grow in Italy are Oleanders, Bougainvillea, Jasmine, Crocus, Cyclamen, Bluebell, Violets, Periwinkles, Alpine Pasque Flower, Spring Gentians, Aquilegia, Aster Alpinus, Convolvulus, Cornflower, Cosmos Bipinnatus, Dahlia Semplicegazania, Geranium A Grandi Fiori, Giant Daisy Margherita Gigante, Lunaria O Moneta and Del Papa(Honesty Flower).
The most traditional flowers used for gifting in Italy are Orange -Tree Flower, White Lily, Violet, and White, Yellow And Pink Roses. Hand-crafted, edible and decorative Italian confetti flowers are also liked by Italians specially on the occasions of Birth Days. To be avoided carefully is the Chrysanthemums, since in Italy it is said to be the flower of funerals and mourning." From:
I hope this helped you. Please let me know if you need further assistance.
Edited by Cher on 12/14/2009 at 11:06 PM EST