Pansy n. : A plant of the genus Viola (V. tricolor) and its blossom, originally purple and yellow. Cultivated varieties have very large flowers of a great diversity of colors. Called also heart's-ease, love-in-idleness, and many other quaint names.

Example:
What is the difference between a Pansy, a viola, and a petunia flower?

Taxonomy
pansy, plants, flowers, petals, species, viola, symbol, pansy flower, gardener, wild pansy, Viola tricolor hortensis, Stem rot, the petals, free encyclopedia, Pansy Monkeyflower, cucumber mosaic virus, Pansy Division, snow cover.

Defination from the web:
... The Freedom From Religion Foundation (FFRF) uses the pansy symbol extensively in its lapel pins and literature. ...