The garden pansy (Viola ×wittrockiana) is a hybrid, one of whose parents is V. tricolor, which is a weed of European grainfields, the other parents being V. lutea and V. altaica. The tufted pansy, or horned viola (V. cornuta), is the parent of numerous forms of bedding pansies. The wild pansy (V. tricolor), also known as Johnny-jump-up, heartsease, and love-in-idleness, has been widely naturalized in North America. The flowers of this form are usually purple and yellow and less than 2 cm (0.8 inches) across.

https://www.britannica.com/plant/pansy-plant