 due to their bright yellow flowers that bloom during the summer months.They are also known as Golden wonder tree, American cassia, Popcorn tree, Cassia excelsa, Golden shower tree or Archibald's cassia.The plant has become an invasive alien species in parts of Africa such as Kenya, Malawi, Tanzania and Uganda after it was introduce for resources such as firewood as well as to help combat deteriorating ecosystems affected by deforestation and desertification.