Aster divaricatus may refer to:
Most often, when written Aster divaricatus L., the basionym for Eurybia divaricata
Less often: A synonym, when written Aster divaricatus (Nutt.) Torr. & A.Gray, for Symphyotrichum divaricatum A synonym, when written Aster divaricatus Raf. ex DC., for Symphyotrichum lateriflorum A synonym, when written Aster divaricatus Lam., for Oclemena acuminata A synonym, when written Aster divaricatus Spreng., for Doellingeria umbellata A synonym (nom. illeg.), when written Aster divaricatus (Nutt.) Kuntze, for Croptilon divaricatum