Viola tricolor

Viola tricolor L., Sp. Pl. 935 1753. (Syn: Jacea tricolor (L.) Opiz (Unresolved); Mnemion agreste Fourr. (Unresolved) ………; Viola tricolor var. hortensis DC.);

As per efi thread:
Viola tricolor is the wild ancestor plant known as heartsease or wild pansy, while Viola x wittrockiana is the large-flowered garden pansy, a complex hybrid that includes V. tricolor as one of its parents. The main differences are that V. x wittrockiana has much larger, showier flowers and is cultivated primarily for ornamental purposes, whereas V. tricolor has smaller, wilder flowers and is known for its use in traditional medicine and as an edible garnish. 

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