Cassia roxburghii vs Cassia marginata

Cassia roxburghii and Cassia marginata both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cassia roxburghii	Yes	No	No	No
Cassia marginata	Yes	No	No	No

As nouns, Cassia roxburghii and Cassia marginata are synonyms defined as:

Cassia roxburghii and Cassia marginata: East Indian tree having long pods containing a black cathartic pulp used as a horse medicine

Other synonyms of Cassia roxburghii include horse cassia.

Cassia roxburghii (noun)	Cassia marginata (noun)
East Indian tree having long pods containing a black cathartic pulp used as a horse medicine	East Indian tree having long pods containing a black cathartic pulp used as a horse medicine