Doellingeria is a genus of flowering plants in the aster family. It contains species formerly included in Aster but now considered to be a distinct genus. They are known commonly as tall flat-topped asters or whitetops. There is still some disagreement as to which species should be included in Doellingeria. Some authorities include up to 10 or 11 species in Doellingeria, but phylogenetic analyses suggest that any Asian plants in the genus should be classified in Aster, making Doellengeria an endemic North American genus. A fourth is now treated as Oclemena reticulata.