 Currently, "S. spectabilis" is overtaking native tree species of forestry ecosystems around the world because of its ability to grow quickly.. 

"S. spectabilis" was long placed in "Cassia", or in the non-monophyletic "Cathartocarpus" assemblage, or separated – together with its relative "Senna peralteana" – in "Pseudocassia".In addition, it has been variously treated under a range of taxa, some of which were also used for related plants