(Photos) Butterweed

Butterweed, a member of the aster family, is rare in northern Illinois, but they grow in Morton Grove, Illinois' St. Paul Woods and Miami Woods. These photographs were taken in late May in both forest preserves.

Its yellow blossoms are tiny--about the size of a fingernail.

The height of the butterweed plants vary widely. From one feet high to over three feet, such as this one.

The butterweed is poisonous to most mammals.

But butterweed in engaging to the eyes.