List of plants known as violet
Violet identifies various plant taxa, particularly species in the genus Viola, within which the common violet is the best known member in Eurasia and the common blue violet and common purple violet are the best known members in North America, but also:

Various species of Barleria, including:
Barleria cristata, Philippine violet
Barleria obtusa, bush violet
Barleria repens, small bush violet
Browallia, bush violets
Erythronium, dog's tooth violets
Exacum affine, Persian violet
Hesperis matronalis, damask violet, dame's violet
Hottonia palustris, water violet
Streptocarpus sect. Saintpaulia, African violets
Telosma cordata, Chinese violet

See also
Securidaca longipedunculata, violet tree