Ternary

Three seasons in one image: summer flowers, autumn leaves, and winter snow.  

The flowers are so pretty that I had to research what kind of plant it is.  And of course, it is a weed.  Linaria vulgaris, otherwise known as "Butter and Eggs" or "Yellow Toadflax."  But I still think it's pretty.  And it's hardy enough to withstand some winter weather.