Sweet violets have been cultivated since 500 BC or earlier by the Greeks and later by the Romans. Both cultures used them as herbs, medicines, sweeteners and for ornamental purposes.
Sweet violets were a symbol of love and fertility and were used to make love potions. Wearing garlands of violets was believed to prevent headaches and dizziness.
The genus Saintpaulia includes African violets, one of six species in the genus. Although their appearance is similar, African violets have little relationship to the Viola genus.
Viola odorata has a long history of medicinal and herbal uses. It contains salicylic acid, a compound used in making aspirin, which makes it effective as pain reliever and anti-inflammatory.
The blue violet -- Viola sororia -- is the state flower in Illinois and New Jersey. In Wisconsin, the wood violet -- Viola papilionacea -- was chosen by schoolchildren as the state flower on arbor day in 1909. Schoolchildren also chose the Early Blue Violet -- Viola palmata -- as the Rhode Island state flower in 1897, but it was not officially adopted until 1968.