Kalmia latifolia, which is commonly called Mountain Laurel or Spoonwood grows in the Eastern United States and is in the Blueberry Family. It is usually found in mountainous forests and rocky slopes. Mountain Laurel blooms in June and July.
Image 1 from www.americangardenhistory.blogspot.com
Image 2 from www.typesofflowers.org
Image 3 from the Massachusettes Horticultural Society