black henbane vs henbane

black henbane and henbane both are nouns.

Word	Noun	Adjective	Verb	Adverb
black henbane	Yes	No	No	No
henbane	Yes	No	No	No

As nouns, black henbane and henbane are synonyms defined as:

black henbane and henbane: poisonous fetid Old World herb having sticky hairy leaves and yellow-brown flowers; yields hyoscyamine and scopolamine

Other synonyms of black henbane include Hyoscyamus niger, stinking nightshade.

black henbane (noun)	henbane (noun)
poisonous fetid Old World herb having sticky hairy leaves and yellow-brown flowers; yields hyoscyamine and scopolamine	poisonous fetid Old World herb having sticky hairy leaves and yellow-brown flowers; yields hyoscyamine and scopolamine