Description: Spreading Phlox (Phlox diffusa) is a species of phlox that is native to western North America from British Columbia to the southwestern United States to the Dakotas, where it grows in many types of habitat, including rocky, high elevation mountain slopes. It is a very compact mat-forming perennial herb growing in cushions or patches of short, decumbent stems. The linear, lance-shaped, or needle-like leaves are no more than 1.5 centimeters long and are oppositely arranged in bundles on the short stems. The corolla has five lobes, which may overlap to form a near circular flower, or remain mostly separate. At the center are several stamens bearing bright yellow anthers. Flower color ranges between white and pink, and four subspecies are recognized, reflecting the large variation in habitat and elevation. This perennial plant blossoms early May through Mid August and then goes dormant in November until next spring.