Kalmia microphylla is found at high elevation on seeps and fens across Western North America. My photos were taken in the Sierra Nevada Range in Alpine county, California. (there are many synonyms for this species including Kalmia microphylla ssp. occidentalis, Kalmia polifolia ssp. microphylla, and Kalmia polifolia ssp. occidentalis)
http://science.halleyhosting.com/nature/gorge/5petal/heath/kalmia/microp...
http://www.calflora.org/cgi-bin/species_query.cgi?where-taxon=Kalmia+pol...
http://plants.usda.gov/java/profile?symbol=KAMI