Rugulosa Characteristics petals white to violet, with a yellow base

 

Viola Characteristics two kinds of flowers: Spring Flowers showy  cross-fertilizing perfect irregular in shape 5 persistent sepals, auricled at the base 5 petals lowest petal prolonged into a spur, sometimes bearded at the throat Summer Flowers remaining closed self-fertilizing (cleistogamous)

 

Violaceae Characteristics calyx regular corolla irregular, 5 separate petals, with one petal spurred or sac-like