You can feed the leaves and flowers of this plant to your tortoise in moderation, but like other members of the Brassica family it contains goitrogens which can interfere with the uptake of iodine and cause thyroid problems, so do not feed large quantities.
This sweet-scented relative of the night-scented stock can easily be confused with Phlox, but is distinguished by the fact leaves come off the stem in an alternate pattern, whereas the leaves of Phlox are opposite each other. Also, Phlox flowers have five petals, but the flowers of Dame's Violet have four petals.
Flowers range in colour from white through pale lilac and pink through to deep purple. Although usually seen as a wildflower, Dame's Violet is also grown as an ornamental plant in the garden.