gymnosperm genus vs genus

gymnosperm genus and genus both are nouns.

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

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

gymnosperm genus (noun)	genus (noun)
a genus of gymnosperms	a general kind of something
	(biology) taxonomic group containing one or more species