Symphyotrichum dumosum
from The Connecticut Botanical Society
Family: Aster (Asteraceae)
• Habitat: open sites with sandy soil
• Height: 1-3 feet
• Flower size: flowerheads 1/2 to 3/4 inches across
• Flower color: white to pale purple ray flowers around a yellow to brownish disk
• Flowering time: August to October
• Origin: native
From Peterson's Guide - flowering branches with many tiny bractlike leaves. Main leaves linear, narrow, spreading or reflexed. Flowers small; rays pale blue-lavender to white. Likes sandy soil.