Alpinia vs genus Alpinia

Alpinia and genus Alpinia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alpinia	Yes	No	No	No
genus Alpinia	Yes	No	No	No

As nouns, Alpinia and genus Alpinia are synonyms defined as:

Alpinia and genus Alpinia: perennial rhizomatous herbs of Asia and Australia and Polynesia having ginger-scented rhizomes

Other synonyms of Alpinia include genus Languas, genus Zerumbet.

Alpinia (noun)	genus Alpinia (noun)
perennial rhizomatous herbs of Asia and Australia and Polynesia having ginger-scented rhizomes	perennial rhizomatous herbs of Asia and Australia and Polynesia having ginger-scented rhizomes