Doellingeria umbellata, known by the common names tall flat-topped white aster, parasol whitetop, or tall white-aster, is a North American plant species in the aster family. It is native to Canada (from Alberta to Newfoundland), St. Pierre and Miquelon, and the eastern and north-central United States (from Nebraska and the Dakotas east to Maine and South to Mississippi, Georgia and the Florida Panhandle. Varieties This perennial grows in full sun or part-shade and moist or draining wet soils that are best slightly acid in reaction, but adapts to moderately acid or slightly alkaline reaction.