genus Houttuynia vs Houttuynia

genus Houttuynia and Houttuynia both are nouns.

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

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

genus Houttuynia and Houttuynia: one species; east Asian low-growing plant of wet places

genus Houttuynia (noun)	Houttuynia (noun)
one species; east Asian low-growing plant of wet places	one species; east Asian low-growing plant of wet places