What plant is that?

Click on photo below to view larger image
Mountain PhloxMountain Phlox--leavesMountain Phlox -- flowersMountain Phlox --budsMountain Phlox leaves and flower stalks
Photo credits: © Peter M. Dziuk, via Minnesota Wildflowers, https://www.minnesotawildflowers.inf

The mystery plant for October, 2021 is a herbaceous perennial native to dry, rocky and sometimes sandy places.  This plant grows from 6-10” tall and can spread to 24 inches.  It has a vigorous spreading habit and has linear awl shaped leaves.  The flowers are about one inch across and have 5 petals and 5 sepals.  The petals are notched at the tips and range in color from pink to blue-violet.  Inside the flower there are 5 stamens of varying lengths and the style is three parted. The five sepals are shorter than the floral tube and lance shaped with a pointed tip. The sepals are hairy and green or sometimes purple colored. “Minnesota Wildflowers” states that this plant is adventive in New England and from Michigan west in Minnesota and south to Tennessee. This plant spreads readily.  Flora Novae Angliae states that this plant grows in all six New England states.

It’s. . .

Botanical Name:
Phlox subulata
Common Name:
  Mountain Phlox, Creeping Phlox, Moss Pink, Moss Phlox
  Polemoniaceae (Phlox Family)
  Rocky or Sandy places, open woodlands, and slopes