 "S. protolaciniata, S. pinnatifolia").The flowers are produced in spring, each flower being in diameter with a four-lobed corolla, the corolla tube narrow, long; they are monoecious, with fertile stamens and stigma in each flower.The usual flower colour is a shade of purple (often a light purple or lilac), but white, pale yellow and pink, and even a dark burgundy color are also found.