
Pennsylvania Smartweed
Dense, terminal, spike-like clusters of small white and pink flowers. The bases of the leaves form a distinctive cylindrical sheath where the stalk joins the stem. This plant is an important part of the habitat for many kinds of birds, which use it for cover and food. In fact, there are at least 50 species of birds that eat the seeds.

''Polygonum pensylvanicum'' is a species of flowering plant in the buckwheat family, Polygonaceae. It is native to parts of North America, where it is widespread in Canada and the United States. It has also been noted as an introduced species in parts of Europe and South America. Common names include Pennsylvania smartweed and pinkweed.