fungus genus vs genus

fungus genus and genus both are nouns.

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

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

fungus genus (noun)	genus (noun)
includes lichen genera	a general kind of something
	(biology) taxonomic group containing one or more species