Lewisia vs genus Lewisia

Lewisia and genus Lewisia both are nouns.

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

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

Lewisia and genus Lewisia: genus of western North American low-growing herbs having linear woolly leaves and large pink flowers

Lewisia (noun)	genus Lewisia (noun)
genus of western North American low-growing herbs having linear woolly leaves and large pink flowers	genus of western North American low-growing herbs having linear woolly leaves and large pink flowers