A legible display showing the phyllotaxy and number of petals would solve all doubts about the identity of the species.
If the plant displayed is Viola blanda,
Identification: Leaves basal and flowers located on separate stalks. Flowers white with 5 petals, fragrant, and with upper petals twisted at the apices. Leaves ovate to heart-shaped, basal indentation between leaf blade and leaf stalk narrow and deep.