Cassia (legume) - Systematics and Taxonomy

Systematics and Taxonomy

There are hundreds of Cassia species, but the exact number is still not clear. The reason is that Cassia was long used as a wastebin taxon for Cassieae in general, most notably Senna and Chamaecrista with which it makes up the Cassiinae. Those species are more recently moved to more correct placements, but the process is still ongoing due to the high number of species, with more than 1000 named taxa having been described for this genus altogether.