Aster umbellatus has flat or occasionally dome-shaped white flower clusters. It is an important host for many butterfly species and attracts other pollinators as well. Does best in full sun to partial shade in wet to moist soil.
AKA Doellingeria umbeliata
For more information on this plant, visit the USDA PLANTS Database:http://plants.usda.gov/java/profile?symbol=DOUMU