Family: Asteraceae 
Synonyms: Conoclinium dichotomum
   Conoclinium flaccidum
   Conoclinium nepetaefolium
   Conoclinium venulosum
   Eupatorium coelestinum
   Eupatorium coelestinum f. album
   Eupatorium coelestinum f. coelestinum
   Eupatorium coelestinum f. illinoense
   Eupatorium deltifolium
   Eupatorium violaceum
Type: Perennial 
Common: Hardy ageratum,
Mist flower 
Location: Photographer's parents' yard (Glen Ellyn, IL)