Hibiscus tiliaceus vs hibiscus

Hibiscus tiliaceus and hibiscus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hibiscus tiliaceus	Yes	No	No	No
hibiscus	Yes	No	No	No

As nouns, hibiscus is a hypernym of Hibiscus tiliaceus; that is, hibiscus is a word with a broader meaning than Hibiscus tiliaceus:

Hibiscus tiliaceus: shrubby tree widely distributed along tropical shores; yields a light tough wood used for canoe outriggers and a fiber used for cordage and caulk; often cultivated for ornament
hibiscus: any plant of the genus Hibiscus

Hibiscus tiliaceus (noun)	hibiscus (noun)
shrubby tree widely distributed along tropical shores; yields a light tough wood used for canoe outriggers and a fiber used for cordage and caulk; often cultivated for ornament	any plant of the genus Hibiscus