Samolus vs genus Samolus

Samolus and genus Samolus both are nouns.

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

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

Samolus and genus Samolus: genus of herbs usually growing in salt marshes: water pimpernels

Samolus (noun)	genus Samolus (noun)
genus of herbs usually growing in salt marshes: water pimpernels	genus of herbs usually growing in salt marshes: water pimpernels