genus Pleurotus vs fungus genus

genus Pleurotus and fungus genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Pleurotus	Yes	No	No	No
fungus genus	Yes	No	No	No

As nouns, fungus genus is a hypernym of genus Pleurotus; that is, fungus genus is a word with a broader meaning than genus Pleurotus:

genus Pleurotus: agarics with white spores and caps having an eccentric stem; an important mushroom of Japan
fungus genus: includes lichen genera

genus Pleurotus (noun)	fungus genus (noun)
agarics with white spores and caps having an eccentric stem; an important mushroom of Japan	includes lichen genera