What plant is that?

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Purple Milkwort Purple Milkwort
Purple Milkwort flower heads Purple Milkwort leaves
Upper and lower left photos:© Francis R. Underwood 2019
Upper right: Katy Chayka, via Minnesota Wildflowers,
https://www.minnesotawildflowers.info/
Lower right: Peter M. Dziuk, via Minnesota Wildflowers,
https://www.minnesotawildflowers.info/

The Mystery Plant for November 2019 is an annual which grows 4-16” tall. The calyx (sepals collectively) is made up of 3 small sepals and 2 large petal-like sepals and 6 stamens. The flowers can range from blue/purple to rose pink in color. As the flowers age, they fade to a greenish white and the lower stem is covered with small bracts which are remnants of flowers gone-by. The alternate green leaves are entire, 1-1.5” long and very narrow. The fruit is a small capsule 1 or 2 seeds.  The root is said to have a fragrance of wintergreen. This plant grows in moist open areas and sometimes in dry areas such as in gravel. It blooms from July through October.

It’s. . .

Botanical Name:
 
Polygala sanguinea
Common Name:
  Purple Milkwort
Family:
  Polygalaceae (Milkwort family)
Habitat:
  Moist areas under powerlines and also in areas of gravel