Alpine Azalea

 Alpine Azalea—Loiseleuria procumbens is a diffusely branched, dwarf mat-forming evergreen shrub that trails on the ground without rooting. They prefer alpine slopes, grow in cold and dry areas at high elevations, and are often found with lichen. They are identifiable from July to August, and found in most of Alaska and Canada, Washington, New York, New Hampshire, Maine, and Eurasia. Their small leaves are bright green and oval, opposite on stems, and leathery. They are hairless above and have short hairs below. The flowers bloom in early June. Their tiny flowers (4 to 5 mm long) are bell-shaped, light to deep pink, and have 5 petals. They are only species of Loiseleuria in North America. Without flowers, it can be confused with Lapland Diapensia which has the same habitat and white flowers. Azalea means “of-dry-habitats” in Latin, and procumbens refers to the low, creeping growth form of the plant.

Reference:
http://www1.dnr.wa.gov/nhp/refdesk/fguide/pdf/loipro.pdf