Why is the orange associated with St. Dominic? From this site we read:
The Orange TreeFrom the original posting of Sacred Destinations Rome: Santa Sabina:
The orange tree pictured is at Santa Sabina and is said to be a direct descendant of the one planted in Rome by Our holy Father Dominic in 1220. Apparently this was the first of its type to be planted in Italy. The Villa Sciarra in Rome has an orange grove grown in commemoration of the bringing of the plant to Italy by St. Dominic.
The Legend of the Orange Tree
In the quadrangular enclosure at Santa Sabina on the Aventine Hill in Rome, there is an orange tree. According to a legend, St. Dominic planted the seed from which it grows. In the nineteenth century, when the tree sent off a new and healthy shoot, having many oranges, someone noted that it was when Pere Lacordaire was a novice. Some took that as a symbol of the new vigor of the Order which was soon restored in France and of its increase in other provinces. And so the legend grew that when the orange tree produced well, there would be a flowering of the Order.
More information and photos of the actual tree can be found on St. Dominic's Orange Tree.
So you'll understand now that images of St. Dominic he is pictured with an orange tree. So raise your orange juice glass to St. Dominic today!
Image of Orange Tree from opeast.org.au and Image of Mimosa from Williams-Sonoma.com