Which is a genus, Dill or Koelreuteria? 
Dill: Dill ("Anethum graveolens") is an annual herb in the celery family Apiaceae. Dill:  It is the only species in the genus "Anethum". Koelreuteria: Koelreuteria is a genus of three species of flowering plants in the family Sapindaceae, native to southern and eastern Asia.
Koelreuteria