Viola tricolor

Introduced species, not described. Illustrations: 3 photographs of Viola tricolor.

From Wikipedia:

Viola tricolor, Also known as Johnny Jump up (though this name is also applied to similar species such as the yellow pansy), heartsease, heart’s ease,heart’s delight, tickle-my-fancy, Jack-jump-up-and-kiss-me, come-and-cuddle-me, three faces in a hood, or love-in-idleness, is a common European wild flower, growing as an annual or short-lived perennial. It has been introduced into North America, where it has spread. It is the progenitor of the cultivated pansy, and is therefore sometimes called wild pansy; before the cultivated pansies were developed, “pansy” was an alternative name for the wild form.