Alexandria senna vs true senna

Alexandria senna and true senna both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alexandria senna	Yes	No	No	No
true senna	Yes	No	No	No

As nouns, Alexandria senna and true senna are synonyms defined as:

Alexandria senna and true senna: erect shrub having racemes of tawny yellow flowers; the dried leaves are used medicinally as a cathartic; sometimes placed in genus Cassia

Alexandria senna (noun)	true senna (noun)
erect shrub having racemes of tawny yellow flowers; the dried leaves are used medicinally as a cathartic; sometimes placed in genus Cassia	erect shrub having racemes of tawny yellow flowers; the dried leaves are used medicinally as a cathartic; sometimes placed in genus Cassia